Horizon of Darkness

Nikta deals lethal damage to Rat 12
Fai auto-attacks Rat 11
Zeikin uses Cleave on 2 targets, prioritizing a single target (preferably not an injured one)
Henry uses Jump on 2, targeting Rat 9 if it's alive; otherwise, Jump on 2, targeting Rat 11; otherwise, auto-attack any target.
Joe, if the rum has an effect on the next battle (it's unclear from the description), he drinks. Otherwise, he still drinks, because the player needs to role-play the character, and he hasn't had a drink in several battles. Level 2.

Turn 6

Nikta uses Hidden Strike
Rat 12 takes 490 damage, Death
Fai attacks Rat 11
Rat 11 takes 158 damage (192 | 350)
Zeikin moves 3 units and uses Cleave
Rat 11
Miss
Henry uses Jump
Rat 9
Miss