I'm not sure about any of the talents or abilities.
If summons were the same as they are now, then having a max of 4 summons per character would break the game. Lone wolf + glass cannon, you could get 2 or 3 summons with each character before the enemy acted. The enemy would then run headfirst into your summons, completely ignoring your PCs. If they killed one or two you would just be able to replace them as well as use the rest of your AP to deal some damage.