iPoker - €0.50 NL (6 max) - Holdem - 6 players
Hand converted by Holdem Manager 3 : http://www.holdemmanager.com

UTG: €120.40 (240.8 bb)
MP: €50.75 (102 bb)
Hero (CO): €137.03 (274.1 bb)
BTN: €49.25 (99 bb)
SB: €50.00 (100 bb)
BB: €52.55 (105.1 bb)

SB posts €0.25, BB posts €0.50

Pre Flop: (pot: €0.75) Hero has Js Ah
2 folds, Hero raises to €1.25, BTN raises to €3.00, 2 folds, Hero calls €1.75

Flop: (€6.75, 2 players) Qd 8d Tc
Hero checks, BTN bets €2.50, Hero calls €2.50

Turn: (€11.75, 2 players) 8h
Hero checks, BTN checks

River: (€11.75, 2 players) Ks
Hero ?

I dont have a clue, why I is this hand history invalid when I try to post it as a HH. Also weaktight says its invalid... Sorry for that.
Villain is a weakish reg, but only 100hands. Generally its a fold pre 100% of the time against a healthy 3bet size and vs a decent reg, but against this sizing and type of player, I think its a profitable call. Seems pretty standard till the river for me. OTR what size should we use, and why? I prefer 90% pot to 130% pot to target KQ, KJ, AK, AA type hands. What should we do, if we get a jam after betting river? Should we fold 100% of the time, or will we ever see some overplayed J9s, 8x, AK, AA, KQ here?