8 handed 5/5

I (1700) open UTG to 20 with Ah2h2d3sQd, UTG+2 (800) calls, middle (1500) calls, BB (2000) calls.

(85)
6s4d2s

X, I bet 40, UTG2 calls, middle calls, BB calls.

(245)
8d

X, I bet 160, UTG2 calls, middle calls, BB calls.

How much would you bet flop and turn?
What would you do on a diamond river or on a paired river?

Would you check turn?

I think you should consider your flop strategy carefully. What are you actually saying betting half pot 4-ways? You don't have a range advantage. I think many of your A3 want to check even. I might have a small sizing on this board but I'd mainly bet big or check.

Turn is similar. With this hand you should bet big or check intending to raise.

I think you should mainly be betting pairing rivers to get value from weaker A3. I'd guess also diamonds, though it doesn't feel so comfortable 4 ways.

Agree with amok that we need to tread carefully both flop and turn. Our hand is very unhappy to face a raise either street and its not difficult to get quartered.

Think I mostly prefer check on the flop but half-pot or even smaller sizing can still be good equity denial.

As played turn is tough - even though diamond draw improves our hand we are only drawing to a single nut high hand in quad 2s (if opponents don't have it). So probably checking is correct but when we do bet it I think I am just going to bomb pot and take the most optimistic view of my hand/runouts.

I don't think you and amok are saying close to the same thing at all on flop. I think he wants to mix checks that probably raise along with large bets (which I agree with).

Yeh my post was a bit unclear. I think hero has a pretty strong hand, but it not so great vs two players if a lot of money goes in. Mainly I was talking about hero's range, not the actual hand. I think a reasonable strategy is to have checks, small bets and big bets in this spot, and with this hand I think betting big is the best option. c/r might be ok, though I think I wouldn't have any at this depth, be it wrong or not.

Ok follow up.

I strongly prefer large flop bet to medium size and in this spot would mostly bet large, with a lower frequency check (idk 20-35%). While I dislike narrowing Hero range with a large bet I think it will check through a lot if we don't. And we do want to start building a pot with our best hands.

After checking I probably check-raise half the time - depends on exact action and player observations.

After we get 3 callers I think the turn is close to a pure check. This would be easier to navigate if we bet flop larger but a better high hand is out there a lot and we have no counterfeit protection for the lo. Another a3 is also possible. Our hand is clearly vulnerable and we want to realize our equity without bloating the pot.

What if we bet large OTF and get check raised pot by BB? that would be an interesting spot for sure.

A or 3 on river would be bad for you

Based on flop action, I'm betting turn or check raise piling.
I think a better hand, likely A35, would have let you know by now.

You can't really make a mistake on this flop. I think it's better on the check and big bet sides.

If a big bet get raised or snapped on flop, you can assess the turn from there, cuz yeah, you're probably getting drawn and quartered.

Not sure if we want to fill up or flush on river, but I think we're in really good shape.