All Star Tower Defense X (ASTD X) continues to shape the Roblox Tower Defense genre with major updates, new units, and game-changing balance tweaks. As of October 2025, the meta is dominated by high-scaling DPS (damage-per-second) units and utility specialists that shine in both Infinite Mode and competitive Arena play.

ASTD X Meta Unit Tier Breakdown

S-Tier – Absolute Meta Dominators

Unmatched DPS, incredible AoE range, and essential utility. These are the must-have units for Infinite Mode and competitive play.

Key Units: Michishibo, Slayer Mage, Magma Marine, Spider Boss, Etri, The Strongest One

A-Tier – High-Tier Powerhouses

Elite performers with specialized strengths such as Hill placement, Stun control, or Support utility. Perfect complements to S-Tier carries.

Key Units: Xero, Dark Wing, Zaruto (Beast Cloak), Ziek (Beast Giant), Blood Commander, Mysterious X, Explosion Artist

B-Tier – Reliable Mid-Game Heroes

Strong choices for Story Mode and early-to-mid Infinite runs. With the right traits, they can remain relevant deeper into the game.

Key Units: Super God Koku, Ramen Grill-Master, Whitestache, Zorro, Kosuke (TS)

C-Tier – Beginner & Niche Options

Solid for new players and early progression, but lose value as difficulty ramps up.

Key Units: Borul, Stampede, The Cursed One, GenD

D-Tier – Outclassed and Replaceable

Weak range, poor scaling, or limited utility. Only useful until stronger units are obtained.

Key Units: Ice Queen, Anti Magician, Captain

S-Tier Breakdown: The Meta’s Unstoppable Forces

The S-Tier defines the top of the ASTD X meta — units that dominate every game mode through overwhelming damage, control, and versatility.

Michishibo

The ultimate DPS powerhouse. Michishibo’s Bleed mechanic tears through even the tankiest bosses, and his one-shot potential makes him a must-have for Infinite runs.

Slayer Mage

A premier Hill Unit with unmatched range, massive AoE, and top-tier DPS. Ideal for maps where elevation plays a role, making him one of the most reliable carries in the game.

Magma Marine

The king of elemental damage, Magma Marine applies Burn DoT (damage over time) effects that melt entire enemy waves and drain boss health rapidly.

Spider Boss (Chrollo)

Combines crowd control and Poison damage, making him a tactical pick for controlling mid-to-late waves. Although expensive, his blend of AoE and utility justifies every coin spent.

Etri

A hybrid beast offering both high raw damage and Freeze control. Perfect for halting enemy advances while dishing out serious punishment.

The Strongest One

An incredibly well-rounded attacker with powerful AoE and consistent scaling. A cornerstone unit for nearly any team composition.

The Power of Traits: What Defines the Meta

In ASTD X, the right trait can completely transform a unit’s performance. The October 2025 meta revolves around traits that boost raw damage, enhance economy, or grant unique placement bonuses.

S-Tier Traits – The Game-Changers

  • All Star: The strongest all-around trait, granting a massive multi-stat boost — including up to +300% damage. Perfect for hyper-carry units.
  • Genesis / Tempest: Genesis adds True Damage (ignoring enemy defenses), while Tempest amplifies damage over time, ideal for burn-based units like Magma Marine.

A-Tier Traits – High-Impact Enhancers

  • Bloodlust: Builds power with every kill, rewarding aggressive, fast-clearing units.
  • Companion: Lets you place extra copies of a unit, doubling their damage or utility coverage.
  • Midas: Boosts cash generation, helping you fund expensive upgrades and get key units out faster.