V appears to be tight-aggro Reg with 18/15/11, AF 5.0. PT automatic notes show him playing quite aggressive and polarizing, with a 3B with T8s, 4B of KK and A9s, C3B QJs/JTs, Float Flop and Probe Turn 100% with 2-3 opportunities each.

As stationy as it sounds on the first look to consider calling AK-high OTR, I put it into Pokercruncher and considering blockers we have 37:63 on the OTR call if I give V a range of 99, KTs+, QTs+, JTs, AQo, KQo - even better than KK 32:68 and much ahead of JJ 28:71. Only AA making a better call 40:60.

Of course AA and KK is much better if we also add some PP or 98s to V´s range which he turns into a bluff OTR, but does anyone find a call here with AK(s) as well, so as not to be reduced so much to the very top of our calling range?

PokerStars - $0.10 NL FAST (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4

BTN: 103.7 BB
SB: 179.1 BB
Hero (BB): 285.2 BB
UTG: 108.5 BB
MP: 195.1 BB
CO: 279.7 BB

SB posts SB 0.5 BB, Hero posts BB 1 BB

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

fold, fold, fold, BTN raises to 2.7 BB, fold, Hero raises to 10 BB, BTN calls 7.3 BB

Flop: (20.5 BB, 2 players) 2 9 Q
Hero checks, BTN bets 13 BB, Hero calls 13 BB

Turn: (46.5 BB, 2 players) 4
Hero checks, BTN bets 15 BB, Hero calls 15 BB

River: (76.5 BB, 2 players) Q
Hero checks, BTN bets 65.7 BB and is all-in

In general you wont see too much bluffing for whole stack vs nitty players like this. It is ok call in theory.
I would cbet this flop is good for us he dose not have QQ all the time and 2 is not helping him either.

I figure AK on Boards with two of Q/J/T/9 makes almost all suited Broadways with a BDF stay and if we hit later get into some uncomfortable spots. Small and half pot won´t fold out middling PP neither on this Board I guess.

What sizing would you use as CB OTF? Then barrel blank turns?