Isn't there something wrong with having a prestigious cohort?
I don't mean in a rules kinda way, I just mean morally. After all, the purpose of the cohort is to sorta stay in the background, which is the opposite of prestige.
Also, two members of the party are elves, which would pretty much limit the acceptance level of the dwarf.
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On a related note, what would be an appropriate cost for armor that does the following:
+2 enhancement bonus
3/day aggravation command word activated
The aggravation ability should make all enemies pass a will save (DC 20 or so) to avoid immediately trying to attack the target.