My logic prolly flowed for this BI level ( some would say for any level
) but...
I don't think 79 is a realistic option here, it's too unlikely given the action , it would require him to c/r the flop as complete bluff, then bet the turn as a semi bluff and shove the river when he gets there. I mean, I guess it's possible , but I can't believe that.
I would recon that his betting is for value or as bluff from the start to the finish of the hand.
Would he not 3 bet 88 pre flop? If a guy plays monsters this fast post flop it would be realistic that he 3 bets his middle pairs pre?
Ax is obv a reasonable option for villain to hold, if he had A8 he played it like a boss imo.
But he also might get stubborn repping the A, even if he knows there are a lot of Ax in your range , he knows that there are a lot of hands without A there also.
I personally would call...too curious not to see his hand.