Just wondering if you'd ever consider turning a hand into bluff on this river given his weak sizing. It doesn't have to particularly be this hand but I can't think of many others with better blockers.
I think he could sometimes be incuding with Kx but most of the time I expect him to transmit his hand strength. The only problem I have with this play is that fishes who like to throw out these small 3bets a lot often turn out to be splashy to totally crazy. And he might feel committed to calling it off with AJ because it's a strong hand absolute-wise and he bet with an inducing size.

So, just stay disciplined and fold or is there merit in at least having a narrow bluffing range here?

Curious what you think.