I noticed that spamming clicks at enemies with single target magic spells (non-projectile) at enemies who are not immediately adjacent to your character will allow you to strike them multiple times in a single turn before they can move. I beat the game easily using this exploit-- in fact one could say it was too easy. Spells that allow you to do this: Diminuating calculus (mathemagic) recursive curse (mathemagic) pyrokinesis (psionics) any other single target spell works. possibly even projectiles.
Fleshbore also works with this technique. It really is effective at killing a lot of things, but probably shouldn't be legal.
The problem is the possibility and the lack of timing locks. The game turns need to be locked hard and only allow another turn fi the last one has completed.