Unfortunate in some ways. Circling up would be hard, and long, but not impossibly so -- if there were anything to fight worth fighting. If there isn't, it's a lot closer to impossible. He can't even summon poorly contained demons and kill them, because his Planar Binding is devil-only.
"The primary distance problem, I suspect, is the part where I'm on a distant planet. I would not expect my location on this planet to make any difference at all. Unless we moved far enough to change the time of dawn -- if my capability requests prove to be bound to dawn at all."