This system of prioritization is known as 'aggro' (aggression), and mastering it is the most critical mechanical skill in the game.
If you cannot reliably predict which target an enemy unit will choose to attack, you are relying entirely on luck.
Vision and Targeting
When a unit is deployed or finishes destroying a target, it scans its specific sight range for the closest valid enemy.
If a massive, slow-moving tank is lumbering toward your tower, you do not need to place your defense directly in front of it.
- Use the arena tiles as a visual guide.
- If a unit is already locked onto a tower, it will ignore closer targets.
- Flying units often have different pathing rules.
Manipulating the Z-Axis and Hitboxes
You can use the physical bulk of your own units to literally push enemy troops out of their preferred path.
For example, if an enemy Miner is locked onto your tower, you can deploy a large tank directly on top of him.
| AI Logic | Tactical Application |
|---|---|
| Proximity Priority | Place a cheap skeleton exactly one tile closer to the enemy than your fragile ranged attacker |
| Aggro Reset on Stun | If an Inferno Tower locks onto your tank, stun it with a spell while placing a swarm nearby |
Drilling the Mechanics
Reading about aggro ranges is completely different from actually executing pixel-perfect placements in the heat of a live match.
Once you internalize the invisible grid that governs the AI, the game slows down dramatically.
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