Call me super obnoxious but I believe that Baudolino05's post page 1 (#477357), Argol228's (#477373), along with Spice's post page 2 (#477477) and two of my own posts page 2 too (#477549 & #477597), contain the best ideas that have been proposed in this thread so far (not a big challenge I know).
I'm quite convinced they would fit the game's current combat system, enhance it with more tactical value, and solve the issues that come the more often, like high lvl spells making everything else useless, or the silly AD&D cooldowns and rest.
