Armorbearer would just recur 12FG. Other than that, he isn't that great for this deck IMO.
I agree with Gabe, Philistine Armorbearer is too good not to use at least x3. Unless they convert/remove from game/set aside your Philistines, Armorbearer counts as another copy of whichever Philistine they discard. Or if none are discarded, simply pull who you want from your deck and you can use the Armorbearer again later when you draw him.
Hence, you can probably drop one of each of the characters you have x4 of and put in Armorbearer x3.
Kirk