If it's 3v3 and all 3 players bind the tower that's 3 60% casts so it's bound to work
That's like 180% chance to work innit oh where's ob when you need him
well it's a good enough chance to risk a restart anyway, maybe you just loose if you fail to cast a tower - then it's up to you how much mana you risk boosting, there are going to be 100's of dragons everywhere if we all bring law shift! that'll probably ruin the game.
If this graphic makes sense (and the idea it illustrates), I'll go ahead and set this game up. This is the shape it took in response to a few questions that came up regarding player positions and terrain and casting of the icarus etc.