TD Problem creeps attacking.

The creeps in my td have the collision size of 1. Though, they attack the towers of the players when they are crowded in a maze, should I change teh collision size t 0.5 or what shall I do?

Why dont you change it to 0?

Did that, they still attack if they try to go through each other ina a very small way(between towers)

Try aquisition range: 0 or 1 or something.
~Piece

With triggers it is possible to turn a units collision off, and I believe that that they are still blocked by buildings.

no they arent, units with no collision walk trough anything (trees/cliffs/buildings...)

Give them the ability Ghost (Visible). They will walk trough units but not through buildings and if one creep is slowed, the others will pass without stucking