Yeah, that's exactly when you use it. Use teleport + nether swap to stack enemies, then move in for your AoE combo. Thick of the Fight -> Adrenaline + Whirlwind -> Reset cooldowns with Skin Graft -> Adrenaline + Whirlwind again -> Battle Stomp. That combo is a total of 9 AP, which you can get if you start the turn with 5 and use Adrenaline twice. Hell you can get a LOT more AP than that with Flesh Sacrifice (elf racial), Time Warp (Fane ability) and Executioner (talent). That's just one example of a super combo. There's lots of others.