Garrett deals ~100-200. Accuracy is around 80.
Sysyalika deals ~80-150 with her crossbow. Accuracy is also 80.
Ayko deals ~50-150 with her spell.
Sysyalika deals ~10-50 with her rain spell.
In total, we can deal ~300-900 damage per round, assuming none of the archers miss. If we get a second turn, we might even reach 1k damage with a bit of luck.
Merel is a good buffer, Zoritsa is a healer, but she needs to save her mana for ~a couple of resurrections. Gion MIGHT be able to tank, but since we don't know how much damage the ice zeppelin deals and how it attacks, I wouldn't rely on that. Kalina can resurrect under the cover of chaos. Only Nora and Mellen are useless in this situation.
Ah, if only we had another mage or archer... Yes, Astral?
🏹🎪+⛓️♿=💕