The act 1 skeleton doll is more effective with a crossbow, in general, since it doesn't last long in a melee fight if it gets targeted (no other dolls can equip a bow or crossbow). The shaman uses spells which spread out and hit everyone in range, and Lightning Storm which will also hit everyone, but even taking some damage the skeleton should be able to help. Also, you should have accumulated enough gold or loot to get a few extra healing potions, if needed.