Very interesting AOS. All troops are heroes, so their levels make them more difficult to kill. That alone is astounding. Also, they grab exp.

Alright; some tips.

1. More items. Seriously, having a 15, then 100 damage claw won't work.
2. More heroes. D0h for this.
3. Make the map bigger...
4. Seriously, it's overkill to get your hero past the enemy borderline if he's less than level 10.

Because of the towers, players are forced to only fight very near each other. There is little room to move and strategise.