you've got a solid core here, but it sort of runs into some issues. the main thing is that there's nothing to really do once a fight starts, because of the auto-aim, but the speed up (while helpful) still leaves you sitting around waiting for things to progress a lot.
also, frost is way more powerful than fire, I beat the game in half the time with a frost build. instant death plus debuffs blows pure damage out of the water.