If you haven't yet read http://www.pcgamer.com/tag/an-illusionist-in-skyrim/: Nerevar have mercy upon you.
It's gotten me thinking about the efficacy of playing highly, highly specialised characters. Some are obviously more practical than others, but I'm particularly thinking of a Restoration specialist. Block is another one: how would it work to only use shields to block, and bash? I don't know how damaging powerbashing can be, but I do know that some equipment can make it more damaging.