Late Saturday night 1/2 table, most players are loose/passive mostly fit/fold.

Main villains are:
1) MP-super loose preflop, peels flop with any piece but gives up turn, never bluff raises, doesn’t overplay his hand.
2) BB-morning old guy, mostly ABC except the occasional cbetting after he raises pre.

$300 effective, UTG straddles $5, Hero $15 UTG1 with KTcc, 5 callers (MP, MP1, CO, BB, UTG).

Flop ($90): QcJs6d
BB checks, UTG checks, Hero $35, MP calls, MP1 folds, CO folds, BB calls, UTG folds

Turn ($195): Qh
BB checks, Hero checks, MP checks

River ($195): Qd
BB checks, Hero $60

Preflop-seems standard?

Flop-6 way, I wasn’t sure what to do with my OESD, but I didn’t really want to check and call a bigger bet so decided to name my price knowing the only hands that would raise at this table would be 2p+ and decided to block bet $35.

Turn-Terrible card once I get two calls. Easy check. Once MP checks behind, I rule out Qx from his range but still worried about BB.

River-BB checks again so he’s mostly giving up with some missed straight draw. He can’t have Jx because he wouldn’t overcall $35 OTF with even AJ. I’m hoping MP behind has some whiffed draw too (although I block some) but he’s certainly capable of having Jx here since he likes to peel flop with any pair. But it would suck to check and have one of them roll over AT or something.

Hero decides to bluff small.

Line check?

Pre I'm raising/folding 50-50 in my games. However, if raising $20-$25 is best.

I do like betting the flop, but I'd go a little larger.

I'm just x'ing down from here. Turn is terrible, and river is pretty bad because I never expect either player to fold Jx on the river.

I think KTs is a tad optimistic for an open first in after the straddle. You have to get through eight other players, three of whom are getting a discount. Moreover, your open size is clearly too small, since you got five callers. I would have made it 25 or 30 to go.Because we are sizing up our raises in this game, we should be tightening our raising range, because the risk/reward for taking down the blinds is too low. So I think i would have just mucked our hand preflop without hesitation.

Flop looks fine to me.

With trips on the board, nobody is ever folding a pair. From what you describe of MP, hands like suited A6 or 77 are real possibilities. I haven't done the work of assigning a range and seeing what parts of it call on the flop and don't bet on the turn, but there is a real possibility that MP has too many combos that call to justify a bet. We also have to think the same way about BB's hand too. Bluffs that have to get through two players are more risky than bluffs to get through a single player.

On the other hand, you are clearly thinking about the right sorts of factors that make bluffing a reasonable choice.

I think check/raise (jam) is an acceptable line on the flop as well

Your range contains the most top sets, and your hand will still have live draws to the nuts

I'm not making a cbet (or even a small one) in a 6 way pot, OOP. It's not folding everyone out on that flop and I'm not really worried about the calling station, I'm more worried about the OMC in the BB. Once he calls I prob give up the hand instead of trying to bluff everyone out.