Arthros steps out of the building. Seeing the drow badly wounded, he moves up behind her. "A moment, let me relive your pain."
He reaches out, touching the worst wound with one hand, warm light radiating outward. He grits his teeth, encountering unexpected resistance, but pushes through, overcoming it.
SpoilerMove to E11, cast cure light wounds, CL 6, on T'rsst, healing (8 maximized + 5 CL + 6 CHA =19 HP
CL check to beat spell resistance (1d20+6)[20] vs 16