Theoretically, yes. I don't really know where to begin with the protagonist- how one would even organize it is tenuous. The way I figure now, each class can be regarded as a set of optional abilities to be used, and all magic items in the game are more or less optional, too. The tiering is... rough, to be honest. There's a lot to go over for it:
- The Netherbrain is specifically stated to be potentially Elminster's superior, but certainly Mystra's inferior
- It specifically possesses the artifact created by Karsus that provided him (albeit brief) 2-A potency
- How much of this should scale to PC's, given the circumstances of its defeat? What, then, scales to NPCs?