I like how you played the hand, although I would shove the turn. MP1 c-bet into 4 people in a three-way pot, when you call his c-bet you're are almost never folding, which is why I don't think he will attempt to bluff you on the turn or river.

You just need to beat 25% of his betting range. Check back and call any river can't be wrong.

On the other side, you obv have 50%+ equity vs his calling range turn. Sets are marginal part of his range.

I like the line pf, flop, I bet turn. He is commited with any pair or draw (never fold JJ/QQ). I'm not sure he bluff too much river.

Not sure we have that much equity vs his turn calling range but how can calling river with say 30% equity be right when we can shove turn with say 45% equity?

I just leveled myself thinking he is trapping with his whole range he bet the flop which initially thought it was too strong (considering its a 4w pot with the maniac still to act). After realising what is my equity ott you all convinced me that its better to shove turn.

running bad doesnt help when playing against good regs. pffff

That's just the way it is, may be I misunderstand you question but :

You need 33% equity to call a pot bet, 25% to call an half pot bet.
When you bet for value you need to be a head, especially when there are no implied.

Bet turn is better than checking, as his worse draws can get away on river and KQ type hands can get away on flush rivers some portion of the time. But this decision doesn't matter much, more or less it plays the same whether you shove turn or river and the one way you are helped by checking is him bluffing flop not turn and bluffing river....seems unlikely.

Flop Call is good, want to increase chances of getting called or raised by people who haven't folded yet.

Preflop is most interesting, I think it is a 4b. There is just so much dead money, the possibility of getting it in good vs fish and the regs are laggy with wider ranges anyways. Calling it plus EV obviously, but our positional advantages and implied odds from our drawing hands go down with the tiny stack to pot ratio. Mostly, it is just a question of who of the four or so players to the flop hits and then it plays itself.

this is a turn decision so it depends on what our river decisions would be. Say for simplicity we call 100% of his river shoves. If we did that, shoving into his monsters on the turn doesn't change anything, we win or lose either way depending on the flush hitting. So the decision only matters against hands where it actually matters against, ie hands that act differently on different streets like KQ which might call when you shove turn but not river or vice versa.