The cut off actually has $1500 and is playing 42/29/11 - RFI 40% on the cut off

Could peel or 3 bet pre-flop.

I feel that the advantages of 3 betting are that: the hand is very disguised (i.e. the opposite to aces and crushes a board that aces would usually be in very bad shape), it plays vs 4 bets pretty well (and we are deep enough/in position), the gap is at the bottom end of the hand (4678), so draws to the nut straights, and 3 betting takes control of the pot / adds some fold equity / makes life tricky for villains.

The disadvantages I think are that: the draws are low and can easily be dominated, the hand in general is pretty weak (I'm not sure if there is a way to do it, but I put the hand vs a 40% range in Equilab Omaha and it came out as 41% equity - this doesn't include the 2 players left to act), and because the pot is inflated by the 3 bet the value of position becomes less.

So I'm not sure whether to 3 bet it not, what do other people think? My conclusion is that flatting is better (unless I have played a big sample of hands on that table and not 3 bet yet), I like playing hands in position

Could raise or call...it's really depressing to say, but on every street in this hand I do not know what the best option is, or how to find out what it is ! :/

What are people's thoughts on the bet sizing ? I think I should do smaller so that I have more options in similar spots with different holdings..do people ever flat here for deception / prevent the pot growing (sounds like the opposite of what I want to happen).

Hero?

There is a lot of missed draws on the river and the king seems less dangerous than a 2, 3 or 5...he jams and my odds are 30% - his river aggro is 34%, I've no reason or evidence to believe is capable of bluffing or not bluffing. He is playing 42/29, could that be factored into the analysis?