The IR is a tight regular the caller is a loose fish who playes 41/29 with 0% 3bet over 30 hands.
I cold4bet here to squeeze out the regular and get HU with the donk or all-in which would be fine imo.
He decides to call and i have to make my decision on the flop. What is the best play in this spot? And what about my sizing preflop?
SB ($98.40)
Hero ($102)
UTG ($155)
UTG+1 ($107)
CO ($71.43)
BTN ($107)
Dealt to Hero A

K
UTG raises to $3.50, fold,
CO raises to $6, fold, fold,
Hero raises to $18, fold,
CO calls $12
FLOP ($40) 6

J

4
Hero ?