5 Best Units to Use in ASTD X Roblox (March 2026) Dominate

I’ve been grinding All Star Tower Defense X since launch day, testing every single unit across all game modes – from Story to Infinite, Challenge to PvP. After countless hours of gameplay and analyzing the current meta, I’ve discovered which units truly dominate the battlefield. Whether you’re a beginner looking to progress faster or a veteran aiming for those leaderboard spots, these 5 units will transform your defense strategy completely.

Top 5 All Star Tower Defense X Units

Rank	Unit Name	Type	Rarity	Best For
1	The Strongest One	Hill/Burn	4-Star	All-Round DPS
2	Slayer Mage	Hill	5-Star	Shield Breaking
3	Mysterious X	Ground/Stun	5-Star	Crowd Control
4	Dark Wing	Hill	5-Star	Infinite Mode
5	Yuni/Venus	Varies	5-Star	Team Support

The 5 Best Units in ASTD X Roblox You Need Right Now

1. The Strongest One – The Undisputed King of DPS

The Strongest One isn’t just a clever name – this 4-star Hill unit legitimately outperforms most 5-star units in the game. Here’s why he’s absolutely essential for your team:

Key Strengths:

• Insane Range: Covers nearly the entire map when fully upgraded
• Burn Damage: Additional DoT effect melts through high-HP enemies
• Cost-Effective: Being a 4-star makes him easier to obtain than 5-stars
• Versatile Placement: Hill placement gives strategic advantages

Pro Strategy: Place The Strongest One on elevated positions early in the match. His burn damage scales incredibly well, making him more valuable the longer enemies stay in his range. Pair him with slow units like Blackstache to maximize burn ticks.

Best Traits: All Star, Genesis, or Bloodlust for maximum damage output

2. Slayer Mage – Your Shield-Breaking Specialist

When it comes to dealing with shielded enemies (and trust me, late-game is full of them), Slayer Mage is your answer. This 5-star Orange Hill unit brings:

Key Strengths:

• Multi-Hit Attacks: Perfect for breaking through shields quickly
• Massive AoE Range: Circular attack pattern hits multiple enemies
• High Base Damage: Even without shields, melts regular enemies
• Synergy King: Works exceptionally well with damage buffers

Pro Strategy: Position Slayer Mage where enemy paths converge. His multi-hit nature makes him incredibly effective against boss units with multiple shield layers. Always prioritize upgrading his attack speed in the skill tree.

Optimal Setup: Pair with King Kaoe or Xero buffers for a 50%+ damage increase

3. Mysterious X – The Ultimate Crowd Controller

Every great defense needs crowd control, and Mysterious X delivers it perfectly. This 5-star Blue Ground unit combines:

Key Strengths:

• Stun Mechanic: Stops enemies completely, buying precious time
• Excellent Range: Covers large areas despite being a ground unit
• Solid DPS: Not just utility – deals respectable damage too
• Game-Changer: Can single-handedly save runs by stunning boss units

Pro Strategy: Place Mysterious X at choke points where enemies bunch up. Time his placement for waves with fast enemies or when your DPS units need time to eliminate threats. His stun can interrupt boss abilities!

Hidden Tech: Stack multiple Mysterious X units for near-permanent stun locks in certain maps

4. Dark Wing – Infinite Mode Destroyer

If you’re serious about climbing Infinite Mode leaderboards, Dark Wing is non-negotiable. This 5-star Green Hill unit features:

Key Strengths:

• Scaling Power: Special mode grows stronger based on total damage dealt
• Massive AoE: Full circular coverage decimates grouped enemies
• Infinite Specialist: Designed specifically for endless game modes
• Transformation Ability: Becomes exponentially stronger over time

Pro Strategy: In Infinite Mode, place Dark Wing early and protect him at all costs. His power snowballs – by wave 50+, he’ll be carrying your entire defense. Focus on keeping him alive rather than spreading upgrades.

Critical Tip: Don’t use Dark Wing for short game modes – his true power needs time to build

5. Yuni & Venus – The Flex Picks

Rounding out our top 5, both Yuni and Venus offer incredible flexibility depending on your needs:

Yuni Strengths:

• Adaptable to any team composition
• Strong base stats across the board
• Excellent for players still learning optimal strategies

Venus Strengths:

• Premium support capabilities
• Enhances entire team performance
• Perfect for coordinated multiplayer runs

Pro Strategy: Choose based on your playstyle – Yuni for aggressive DPS focus, Venus for strategic team enhancement. Both units excel when given proper trait rolls.

Essential Unit Synergies and Team Building

Understanding unit synergies separates good players from great ones. Here are the most powerful combinations I’ve discovered:

The Meta Team Composition

Core Setup:

1. The Strongest One – Primary DPS
2. Slayer Mage – Shield breaker
3. Mysterious X – Crowd control
4. King Kaoe/Xero – Damage buffer (50% boost)
5. Blackstache – Slow support (40% slow)
6. Flex Slot – Dark Wing for Infinite, Ramen Grill Master for farming

This composition covers all bases: raw damage, utility, crowd control, and support. In my testing on Innovation Island, this setup consistently reaches wave 100+ in Infinite Mode.

Budget-Friendly Alternatives

Not everyone has access to all 5-star units immediately. Here’s a powerful budget composition:

F2P Friendly Team:

• The Strongest One (4-star, easier to obtain)
• Shirtless Magician (4-star freeze unit)
• Koro (Lobby) (4-star full AoE)
• Zaruto (Sage) + Kosuke (TS) (4-star team combo)
• Ice Queen (3-star support)

This team costs significantly less to build but can still clear most content when properly upgraded.

Advanced Strategies for Maximum Efficiency in ASTD X

Trait Optimization Guide

Getting the right traits can increase your unit’s power by 50% or more. Here’s what to aim for:

S-Tier Traits (Reroll Priority):

• All Star: True damage on every attack
• Genesis: Unique abilities and stat boosts
• Tempest: AoE enhancement

A-Tier Traits (Keep These):

• Bloodlust: Damage increases with kills
• Companion: Spawns helper units

Budget Traits (Better Than Nothing):

• Tank: +50% durability
• Dexterity III: Attack speed boost

Skill Tree Optimization

Each unit can only choose one path, so choose wisely:

Damage Path Best For:

• The Strongest One
• Slayer Mage
• Primary DPS units

Range Path Best For:

• Support units
• Units with already high damage

Speed Path Best For:

• Mysterious X (more frequent stuns)
• Shield breakers

Placement Strategies That Win Games

Map knowledge is crucial. Here are universal tips that work across all ASTD X maps:

1. Hill Unit Positioning: Always prioritize central elevated positions for maximum coverage
2. Choke Point Control: Place Mysterious X and slow units where paths narrow
3. Layered Defense: Don’t cluster all units – spread them to cover enemy escape routes
4. Early Game Priority: Get The Strongest One down ASAP for burn damage accumulation

Current Meta Analysis and Future-Proofing

Why These Units Dominate March 2026

The current ASTD X meta heavily favors:

• Multi-hit attacks (shield meta counter)
• Crowd control (enemy speed increases each update)
• Scaling damage (Infinite Mode importance)
• Team synergies (solo carry units got nerfed)

Our top 5 units excel in all these areas, making them future-proof investments.

Upcoming Changes to Watch

Based on developer patterns and community discussions in the official Discord, expect:

• Potential Whitebeard release (save gems!)
• Hill unit rebalancing (invest now)
• New challenge modes favoring diverse teams

How to Obtain These Units Efficiently

Banner Strategy Guide

The banner system rotates every 60 minutes. Here’s how to maximize your chances:

Optimal Pulling Strategy:

1. Always 10x Summon: Better rates and guaranteed 4-star minimum
2. Track Banner Rotations: Set alarms for units you need
3. 100-Pull Pity System: Guarantees a 5-star after 100 pulls per banner
4. Save During Events: Special banners often have rate-ups

Resource Management Tips

Gem Optimization:

• Complete daily quests (300 gems/day)
• Use codes (check our complete ASTD codes guide)
• Focus Challenge Mode for skill orbs
• Join active Tower Defense communities for tips

F2P Progression Path

• Week 1-2: Focus on getting The Strongest One
• Week 3-4: Save for Slayer Mage or Mysterious X
• Month 2: Complete your core team
• Month 3+: Optimize traits and skill trees

Common Mistakes to Avoid

After watching countless players struggle, here are the biggest mistakes I see:

1. Ignoring 4-Star Units

Many players skip 4-stars chasing 5-stars. Don’t! The Strongest One proves rarity isn’t everything.

2. Poor Trait Management

Using trait burners randomly wastes resources. Save them for S-tier units only.

3. Neglecting Team Synergy

Five random 5-stars < coordinated 4-star team. Always prioritize synergy.

4. Inefficient Placement

Hill units on ground level = wasted potential. Learn map layouts!

5. Spreading Upgrades Too Thin

Focus on maxing 2-3 core units rather than evenly upgrading 6 mediocre ones.

Game Mode Specific Strategies

Story Mode Domination

For story progression, focus on:

• The Strongest One + any AoE unit
• Rush to unlock all unit slots
• Prioritize player level for better rewards

Infinite Mode Mastery

Infinite Mode requires:

• Dark Wing as centerpiece
• King Kaoe or Xero for buffs
• Blackstache for enemy management
• Save resources for late waves

Challenge Mode Excellence

Challenge modes need flexibility:

• Build diverse roster for different modifiers
• Mysterious X excels in speed challenges
• Farm skill orbs aggressively here

PvP Tactics

Competitive play demands:

• Meta team composition (see above)
• Perfect trait rolls (no exceptions)
• Map-specific strategies
• Quick adaptation skills

Frequently Asked Questions

Which unit should I prioritize first as a beginner?

The Strongest One should be your first target. As a 4-star, he’s easier to obtain than 5-stars while providing 5-star level performance. His burn damage helps beginners clear content above their level, and he remains useful even in endgame content. Focus all your early resources on maxing him out.

Are support units like King Kaoe really necessary?

Absolutely! Support units like King Kaoe and Xero provide 50% damage buffs to nearby units. This essentially gives you 1.5x the damage output without placing additional DPS units. In late game, the difference between having buffers and not having them is often the difference between victory and defeat.

How important are traits compared to unit levels?

Traits can be more impactful than levels in many cases. An All Star or Genesis trait can add 30-50% more effective damage, while each level might only add 5-10%. However, you need both – a level 1 unit with perfect traits will still underperform. Prioritize getting units to level 10+, then focus on trait optimization.

Should I save gems for specific banners or summon whenever I can?

Always save for specific units! The Strongest One, Slayer Mage, and Mysterious X should be your priorities. With banners rotating every 60 minutes, patience pays off. Set timers, check Discord for banner schedules, and never waste gems on units you don’t need.

What’s the best way to farm skill orbs?

Challenge Mode is your primary source for skill orbs. Focus on the highest difficulty you can consistently clear – even if it takes longer, the rewards are worth it. Also, use skill orb bags from codes efficiently by opening them only when you need specific colors for your main units.

Can I succeed without spending money?

Definitely! ASTD X is very F2P friendly if you play smart. Use all available codes, complete daily quests, and be patient with banner rotations. Many top players are completely F2P – success comes from strategy and resource management, not wallet size.

Which skill tree path is best for each unit?

• The Strongest One: Damage path (maximize burn potential)
• Slayer Mage: Damage path (shield breaking power)
• Mysterious X: Speed path (more frequent stuns)
• Dark Wing: Damage path (scaling optimization)
• Support Units: Range path (wider buff coverage)

How do I deal with shielded enemies in later waves?

Shielded enemies are why Slayer Mage is S-tier. His multi-hit attacks break shields faster than any other unit. Combine him with Stampede or Jon Jo (budget options) for a shield-breaking squad. Position them early in the enemy path to strip shields before enemies reach your main DPS.

Is it worth evolving 4-star units to 5-star?

Yes, but only for specific units. Zaruto (Sage) evolves into an excellent 5-star, as does Borul. However, don’t evolve The Strongest One – he’s actually better as a 4-star due to lower placement costs and faster upgrades while maintaining similar damage output.

What’s the optimal team composition for beginners?

Start with:

1. The Strongest One (main DPS)
2. Kosuke (TS) (starting unit, decent until replaced)
3. Ice Queen (3-star crowd control)
4. Any AoE unit you pull
5. Flex slot for experimentation

This gives you damage, crowd control, and room to grow while learning game mechanics.

Conclusion: Your Path to ASTD X Domination

Success in All Star Tower Defense X isn’t about having the rarest units – it’s about understanding synergies, optimizing resources, and building smart team compositions. The 5 units I’ve highlighted – The Strongest One, Slayer Mage, Mysterious X, Dark Wing, and Yuni/Venus – form the foundation of virtually every top-tier team in 2026.

Remember: start with The Strongest One, build your team gradually, and always prioritize synergy over rarity. With these units and strategies, you’ll be clearing Infinite Mode waves and climbing leaderboards faster than ever before.

Keep grinding, keep optimizing, and most importantly – have fun defending! The meta will evolve, new units will release, but these fundamentals will keep you ahead of the curve. See you at the top of the leaderboards!

Ready to build your dream team? Start by checking out the latest Tower Defense game codes and join the community to stay updated on meta changes and strategies!