
I haven't actually seen exactly this done before, applause for sure. Just seen some people saying they're not good with spellcasters in the secret shame thread, and this was a pretty complicated stunt for entry level spellcating. Thought I'd point out that if you're just goign for a regular spellcasting gig with no crazy conditions like skipping levels, a good guy to get a handle on it is actually the Pissorf + CB Orc Fighter as that's his default modus operandi and quite fun.
What you guys do is pretty much this, but don't mind quaffing potions, and start out in Binlor with Crystal Ball, pick up Binlor piety as you explore (and popcorn bowl) and swap into literally whatever (or nothing at all), but use dings to refill the mana and the crytal ball.