I guess I'm not sure if I follow... I was under the impression that I can fill whatever slots I have, but naturally -- similar types of bonuses don't stack. When I first made the character, I was thinking that an "Enhancement Bonus" from armor would stack with Bracers, but after thinking about that, I realized that was silly.
My goal here is to wear the Bracers of Armor for their armor bonus, and the +1 Soulfire Shirt ONLY for the Soulfire Property -- the +1 from the shirt is basically just a 'tax' in order to have the property.
Is that more clear? Or are you saying that the two items can't be worn at the same time at all?
I'll fix the Cohort, thank you! I still need to figure out what I want, if anything.