research and rank are fixed.
evileeyore:
And yeah, I always recommend See Invisible. If your foe winks out, you're as good as beat already.
I think it depends on the meta-game you're in. I eventually threw this guy out here not because I think this is the best build for a wizard duel, but because the meta-game has to start somewhere.
The character as built actually has two existing plans for an invisible foe. The first is to turn into a bat and play keep-away until the maintenance cost on invisibility exhausts my foe. shapechange has a long duration, and the bat can see invisible, and in the dark via echolocation. It can also fly for maximum evasion. The other plan is create fire: I know where they were, I can cover a big area, and I can cast it quickly.