To get a robe that increases your charisma and will give you a breath weapon that gives you control of the spells target, go to the inn at bergost where tazok is staying. there will be a fat man in the room across the hall from him named algernon, or he will be wandering around. Take imoen up there save the game and pick pocket from algernon, hopefully her pick pocket is good enough but once you get it, have it identified and you can recruit any man, beast, critter, or monster good or evil on the spot.