MP1 isn't limping for set value unless he's a total donk, so that narrows it down to broadway looking to pair a flop or slowplaying a high pair, which also seems kind of donkish. Without a read, I'd put him on high cards, something like KQ/KJ. I think AJ is ahead here and I'd probably raise to isolate. On the flop I don't think this is tricky at all--I'd lay this down pretty quickly to any action.

Curious what everybody else's opinions will be...