Preflop strategy: AKo in BB

Vilain is a 50/33/13 fish aggro, his CO RFI is 29.6%, his 4B rate after raise is 14.7%.

Also he folds extremely little at 3B, only 16% and I've never seen it open limp.

Winamax - €4 NL (5 max) - Holdem - 4 players
Hand converted by PokerTracker 4

Hero (BB): 108 BB
CO: 96.47 BB
BTN: 367.5 BB
SB: 171.29 BB

SB posts SB 0.5 BB, Hero posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has A♦ K♣

CO raises to 2.5 BB, fold, fold, Hero ??

What is the best play here? 3Bet 9, 11, 13+ BB? Call? Fold? Personally, I prefer call but I think it's closed.

I also wonder if 3B shove is not an option...