I'm playing something similar to this, with a few exceptions
1. No magic on anybody, period. Scrolls still allowed. I'm using Madora as a 2-h warrior, instead of a mage.
2. My Scoundrel main character has used sneak defensively in combat (he lacks Guerilla). None of my other characters sneak in combat.

I don't really see why you would ban 2-handers, but NOT ban mages. I'd trade Madora for someone who can cast heals and buffs and elemental spells in a hearbeat, if I weren't purposefully limiting myself.

No idea why you would ban bows at all.

Glass Cannon is ridiculously powerful, even without combining it with any other talents (or the elemental shield spells). I would ban it outright.