This system of prioritization is known as 'aggro' (aggression), and mastering it is the most critical mechanical skill in the game.
This article will dissect the mathematics of sightlines, retargeting, and unit hitboxes to help you manipulate the AI flawlessly.
How Units See the Arena
If multiple enemies are within that radius, the AI will almost always lock onto the absolute closest target mathematically.
If a massive, slow-moving tank is lumbering toward your tower, you do not need to place your defense directly in front of it.
- Count the squares to ensure perfect placement.
- You must use a stun spell (like Zap) to force it to rescan.
- They ignore the river and take direct diagonal lines.
The Geometry of Defense
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.
| Unit Category | AI Pattern |
|---|---|
| Siege Targeters | Completely ignore all enemy troops, making them incredibly easy to kite across the entire map with cheap structures |
| Fast Attackers | Often have dash abilities that lock onto targets from far away; must be intercepted before the dash animation begins |
Mastering the Grid
Reading about aggro ranges is completely different from actually executing pixel-perfect placements in the heat of a live match.
You will no longer panic when a massive push approaches; you will simply calculate the optimal placement and watch the AI dance to your tune.
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