To better utilize area-of-effect ammo, add an ability that lets you launch a bolt/bomb PAST rows of monsters into the middle of a crowd. Sacrifice the raw damage provided by the weapon in exchange for more efficiently applying the effect.
That sounds nice, perhaps such a shot/ throw could bypass any walls and barriers magically. I would certainly consider actually taking the Throwing/ Archery skill trees with my ranged builds if there were activated abilities like that!
