Can you "over level" spells?
For example normally you'd only need +3 levels to a spell school to get max level spells.
but if the opponent has -1 spell levels that puts you at only +2 so your spells are no longer max.
So could you get +4 total levels to your spells to counteract this? I vaguely remember hearing that you can't since the game "caps" you at +3 levels but I just want to be sure.