I also have a staff mage but is not a summoner and I didn't trained the Mage Armor, I'm more like a heavy archer, also, no stability, nor stun immunity, currently at level 25 (with 7+1 int.) my body count is:
enemies killed 21230
My deal is that I ruined the build, by resetting skills to try out the new ones, very lazy of me, now I lost the save before resetting, and have to pay again.
Edit: Forgot to mention I don't wear robes, either -I don't like them because they make me look fat...
Well my favorite mage armor is the Thuramian Full Plate Armor, which has a super badass look! Only problem is we have to murder Sir Valeran to get the chest piece, which is sad, cause he's cool.
Hey I wonder... Would it possible to play a mage without using any weapon at all? Can we fight only with spells?