Ha, I knew that this summon is pretty good, but I never considered overcharge, which makes it even better. Sadly a lot of enemies have poison immunity or are undead. Still, your combo is like 7 AP for the player character and basically all AP of the summon (as it dies after that). But it only costs 1 SP, so it's quite cheap compared to other powerful source spells. To be honest, I like it as it is. Never were a fan of source points.
I am not sure what you wanted to imply, but if you are looking for cheesy plays, search for telekinesis build.
