All Star Tower Defense X (ASTDX) is another Roblox game that combines anime with the Tower Defense genre, where the right selection of units will determine the course of the game and defense against enemy waves. To help you assemble a good and strong team, we've created a tier list of the best units in All Star Tower Defense X.

Why the Tier List is Important in ASTDX

ASTDX revolves around limited team slots, and not every summon guarantees a strong character. Some have high DPS, others provide buffs or generate resources, and some try to combine everything but with certain limitations.

Knowing each unit's capabilities and their place in the current meta saves a lot of time and nerves. A good tier list not only shows who is stronger but allows you to create a team that works as a whole—especially in the challenging late stages of the game.

Explanation of ASTDX Tiers

Each unit in the game is placed in one of five tiers—from S (strongest) to D (weakest). The ranking is based on in-game testing, player feedback, and how well the units perform in different modes—Infinite, Story, and Arena.

• S Tier — These are the absolute leaders, dominating in any situation—whether it's dealing damage, support, or economy.
• A Tier — Flexible and strong characters, though not as influential.
• B Tier — Stable but not very effective at high difficulty levels.
• C Tier — Suitable for beginners but quickly lose relevance.
• D Tier — Units that are better replaced as soon as a stronger alternative is obtained.

Tier List All Star Tower Defense X

S-Tier Units in ASTDX

The best characters (units) in All Star Tower Defense X. Having one, several, or even just one of them can significantly strengthen your team thanks to the powerful skills and abilities of heroes at this level. They can deal massive damage, have high DPS, and effective AoE abilities and attacks. The drawbacks of these heroes are minimal, making them the best units in the game.

• Michishibo
• Magma Marine
• Slayer Mage
• Etri
• Xero
• The Strongest One
• Dark Wing
• Zaruto (Beast Cloak)
• Ziek (Beast Giant)

A-Tier Units in ASTDX

A-Tier units are just slightly behind S-rank heroes. They can also be considered among the best—thanks to their high damage or powerful team support skills. However, some drawbacks are more noticeable than in higher-level characters. We include the following ASTDX units in the A-Tier:

• King Kaoe
• Venus
• Zorro
• Mysterious X
• Explosion Artist
• Ikki (Hollow)
• Airren
• Yuni
• Super Borul
• Spade
• Janji
• Jin Sung

B-Tier Units in ASTDX

You will summon these All Star Tower Defense X units more often due to higher drop chances. They are the middle ground: not too powerful, but not weak either. Up to a certain point, they will demonstrate good damage or team support. However, in the later stages of the game, you will already feel their lack of effectiveness.

• Ramen Grill-Master
• Kosuke (TS)
• Vegu (Mind)
• Zaruto (Sage)
• Ruffy (Lobby)
• Super God Koku
• Nighty
• Kujo
• Ikki (HalfMask)
• Whitestache

C-Tier Units in ASTDX

C-Tier heroes are mostly suitable only for passing initial and some mid-level stages in story mode. They are easy to obtain, but for higher-level game modes, these units are already insufficiently effective—due to noticeably lower damage, weak stats, and limited capabilities. C-rank units include:

• Borul
• Stampede
• Nezichi
• Koro (Lobby)
• The Cursed One
• Onwin
• Gen
• Super Koku
• Water Goddess
• Dual Servant

D-Tier Units in ASTDX

D-Tier heroes are purely beginner-level units that need to be improved or replaced as soon as possible. We generally recommend changing them at the first opportunity for higher-ranked characters from our tier list to significantly simplify wave progression in this Tower Defense game.

• Ice Queen
• Anti Magician
• Ikki (Early)
• Jon Jo
• Vegu
• Spirit Detective
• Zaruto
• Kosuke
• Koku
• Captain
• Uru
• Lami
• Ruffy

How to Get the Best Characters in All Star Tower Defense X

The unit summoning system in ASTDX operates on gems, which can be earned in-game or obtained via codes. Banners are regularly updated, so it's important to know when to summon units. Prioritize banners featuring top-ranked characters—S and A tier according to the ranking.

New units can be obtained as follows:

To access the Summon area, click the Warp button on the left side of the screen. One summon costs 50 gems, while ten summons cost 450 gems. You can also switch banners to increase the chances of getting a specific unit.

Extremely rare characters have a drop chance of only 0.01%, while regular five-star ones are about 1%. That's why it's worth saving gems in advance and waiting for top units to appear in the banner.

Other ways to obtain characters:

• AFK Area — automatic rewards for staying in the game
• Royal Drops — obtained from specific in-game events
• Arena Battles — arena competitions
• Event Quests — temporary quests with rewards

These methods allow you to obtain not only the units themselves but also materials for their evolution, which significantly eases team development without complete reliance on luck during summoning.

Share your best heroes that you own in All Star Tower Defense X and which unit you consider the strongest.