Remathilis
Legend
It might, depending on your game. The only thing not stacking with Def is AC bonuses and magic armor bonuses. Shields, Natural Armor, Deflection, Dodge, Haste and other bonuses stack. I'd avoid the feat in a magic rich game.blackshirt5 said:Do you think a feat that'd allow a character to add half the AC value of their armor to their AC+their Defense Bonus would be overpowered?
A 20th level fighter under the UA system has a 22 AC base, plus Dex (remember no cap), shield, and magic goodies. A good dex (14) and med shield is 26 AC before magic. Our hypothetical fighter with full plate and the feat would have a 29 before magic.
If you're thinking of going that route, just use the armor as DR rules next to Def to stack its ac with DR (you get half the AC value as AC, the other half as DR).