Home game setting, my 2nd time there so don't know most of the players.

Villain: smart, "dangerous" LAG. The type of player that is very good but lacks discipline to his own EV's demise (so in a sense, not good). He is down over 1.5k in a deep 2/5 game (not surprising). Very aggressive in big pots and weaker players avoid him. Have only played with him so much but my guess is that he is a winning player. He was running the table over before hitting some high variance run-bad.

Hero: perceived as LAG, have been 3-betting weak players IP a good amount this session. V is perceptive and puts hero as LAG (called one of my bluffs earlier in the night), though I'm not as lag as himself.

Effective stacks: $2.5k ish

Straddle is on for $10. 30-50% hands at this point are straddled.

Weak player opens to $30. Villain 3-bets to $110. Hero wakes up in SB with QQ and 4-bets to $325. Villain calls quickly (not atypical for him to snap call)

Villain has a very low fold to 3bet or 4bet IP. I haven't seen him fold to a 3bet or 4bet all night (~3hrs) in a game that is pretty aggressive. Haven't seen him 5-bet either, yet (though he did later in the night). Not surprised he called, and I expect him to be decently wide. He may think I'm wide as well, not sure. I'm definitely not thrilled to be going OOP against him.

Headsup to flop

Flop (~$680): 763r. Check check. Thoughts here? I think default here is to range-bet 1/3ish, but I felt that would accomplish nothing here except bloat the pot OOP against a dangerous V since with this V he rarely (never) folds to a c-bet in a headsup 3b / 4b pot. Thoughts?

Turn: J. Now a flush draw. I bet $250. Quick call (he normally calls quick).

Turn (~$1180): K. No flush. K is good for our range... what do we do here?

Thoughts on previous streets?

Sorry, this might be the wrong sub-forum. This was 9handed.

What does your 4bet range look like?

What 4bet calls had you seen villain showdown?

How does villain play 4 bet pots? How does villain respond to weakness in general?

Flop should be a mandatory cbet imho. Sizing is probably somewhat irrelevant because of the 4 bet and pot size we can probably get stacks in either way by the river if we want to.

As played I would bet slightly bigger on the turn.

As played K seems better for villain's range maybe more of a blank if he's not going to float AK here ott so I'd just check/decide. Probably mostly calling river bets depending on size etc.

Flop is a fine check - we never have 77 66 or 33. We also rarely have 45

Turn bet is meh - I probably go bigger - $350 - $400. We can possibly have JJ in our range - will fold to a raise most of the time although vs this type of player may be tough to ever fold.

River - Interesting spot a few ways to play it.

You could bet really small to kind of protect how much you want to put in the pot although he might bluff raise - which is unlikely due to your 4bet.

I don't really like betting big here as we fold out hands like 88-TT and only get called by better.

You could check evaluate. Gonna be annoying if he bets big.

I kind of like betting small or checking river.

Your 4 bet range to him is the key to this hand in my opinion.

The V style is likely to flat the 4 bet with medium pairs and some suited Broadway hands, given the fact that he is in position and deep.

One way I like the flop check since on that rainbow 4 bet pot it is unlike that V hits hard but if V never folds to a c-bet in position that is a leak that hero can get advantage of (if he has a weak 4bet calling range)

Given your line I will continue betting on river. Sizing depends on if you think he can shove facing a small river bet. If he has that weapon in is arsenal the c/c or bet big to kill is bluff shove.

I 4b to 400ish giving the description about V..

Flop is a very clear Cbet. I don't know what you're scared of. Do you really expect villain to show up with a set or a straight on a 763 board in a 4bet pot? If he does have junk like that in his range, then he's got to have all the 55-JJ too, which is just more reason to value bet.

Turn is okay but could size up a little to $350ish.

As played, we should bet/fold like $600 on the river for thin value. Villain is going to have a lot of middling pairs here and a lot of Jx suited hands.