Horizon of Darkness

Yes, you can, but I'm saving my 3rd-level slots for the next battle. We'll probably be using your chains actively then.
That's possible.

Golem deals 13 damage.
Kalimor either uses Kinetic Strike for 2 damage on the Rat (13), or Kinetic Strike for 2 damage on the Rat (9) (not an AoE version, as I understand it, AoE won't be possible from this position anyway).
Araelle skips her turn (if she healed Joe, Joe would lose his Adrenaline, right?).
Let's see what happens next.

Golem attacks Rat, dealing 13 damage
Miss
Kalimor uses Kinetic Strike
Rat takes 337 damage, Death
Araelle uses Healing
Joe recovers 128 health points (1050 |1310)