Villain: 18/12/3bet 3/ f3bet 54/f4bet 100%(1/1)/fcbet 45/A.F. 4/283hands.
reads: plays aggro flush draws in 3bpot.
preflop i decided to 4b. vs.co (who is a aggro reg) with the intention of calling a shove.
when UTG calls i expect him to have AA,JJ,1010,99 prly AK and AQ. didn't see him.
OTF i think a cbet is mandatory, but what do you think about the turn?
what about betsizes? and preflop play?

Pre is close I don't hate folding to CO's 3bet at all because utg looks tight but if you feel that co is aggro enough then its fine.

Post looks fine except I'd cbet like $9.

Do you have villain as a complete retard? Cause otherwise I don't see him cold calling the 4bet with 99-JJ, given positions. I'd put his range at 60% KK, 15% AA, 25% some of the hands you listed.

Given that flop cbet is a mistake. You should just give up.

Wat?

OP, what is villain's fold to cbet in 3bet pots?
Is he ever flatting KK/AA pf?
Is he ever calling AK to cold 4bet oop?
Is he likely to call ur flop cbet with AK?

looks good to me

30%
don't have this read yet,but he could call with AA in this spot to keep CO in.
personally i consider Villain a weak reg, so i could expect him to flat here with Ak
....

pre is close. arguments could be made for folding, calling, and cold 4betting. I don't really like a cold 4b vs an 18/12 who opens utg. The cold 4b looks so strong, especially because this is always your value range and never a bluff. I think you just iso yourself to often against KK+ against regs, even if they are weak ones. If i'm utg or even co, i can comfortably fold JJ and AK.

Cold 4betting an UTG open looks ridiculously strong. Think about it for a second and you'll realize that no one competent would call with 99-JJ in UTG's spot.

Yeah, ofc i agree, but OP gives range for villain as much wider and says he's a weak reg, so was basing thoughts on that tbh

Purely from stats he's only ever carrying on with 2%.
Given AK likely folds flop should he be bad enough to flat pre, he has QQ+ left in his range come the turn right

I think I like flatting pre to keep CO's range wide if you perceive him to be that way here. As played you can make flop smaller but rest of the hand is fine.

Fold preflop for an easy life your not closing the action and you have no idea what utg is upto yet.

Flat c/o ip if you think you can navigate vs utg if he decides to call and you have intentions of folding if he shoves. Your flatting to get value from c/o obviously.

4B to call a shove ? How aggro is he that he gets stacks in vs a cold 4b with a range worse than QQ ?