A pfr of 16% isn't necessarily too high. Does he have a pfr of 16% from all positions? In that case it's probably too high, reraise him w/AJ. Is he tighter in early position, but raises suited connectors, QJ-like stuff, occasional trash, etc, from late position, depending on which players are in blinds or have limped? Then it's not too high IMO. In that case, be much more careful about reraising with AJ when he's raised from EP (though account for what he thinks your image is).