Now perhaps this is overpowered if this is allowed, but it is a little nutty since a shaman who will only last 3 turns might never get enough adrenaline to even do his dancing axes.
It might also be hard to code for since I imagine the phantomed units are taken from the base of the unit. Adrenaline was probably hacked POST the initial battle, so the base unit doesn't have adrenaline.
Bleh.