Rabastan went home to lick his own wounds, tyvm. He isn't hurt enough that he believes he requires healing and he's probably locked himself in his room drinking whiskey and chain smoking, especially as the burning of the Mark begins to intensify. Liam and Ernie can probably hear him slamming his fist into the wall every few hours in frustration... In reality he's mentally preparing himself for when Voldemort shows up. After he sleeps for a few hours and sobers up, he'll probably start helping patrol again.