JudasIscariot
Arcane
JudasIscariot with those skills you are more than capable of beating them, so don't give up. Poison and feint, out of what's been mentioned, can alone win the day for you. Even if you're not abel to damage them very much, as long as you manage the AI of your allies you're fine. That is to say: most of your allies do very good damage with the crossbow, but not with their melee weapons.
Consider the leftmost ally. He starts off away from the rest of you, will quickly get closed down by at least the hammer-wielding enemy, and then he will often spend the next few turns just trying to move away from them. If you are able to go over and engage them with Feint, or hit them fast enough to get them down, or protect your ally with flame vials, etc., then he will be able to quickly take out half of the enemy.
The same goes for the right side of the battle. The merchant robe wielding ally is going to die very quickly if surrounded, especially since the heavily armoured enemy leader often goes right for him. Keep him out of trouble, and more importantly, keep him focused on less armoured allies, and he can be helpful; in contrast, left to go toe-to-toe against the enemy leader, eh'll just clink uselessly at the armour and die.
The fight I am in is just me by myself against these dudes who have some armor I need for a quest. There ain't no one else here.