2-5 PLO 150BB deep, back raise spot

Note I mostly play in soft loose 2-5 games that feature a lot of limping with about half of the hands being single raise pots and three bet pots mostly meaning the three bettor has good aces. In my own case I usually don't three bet my weaker aces (I tend to play 150 to 300 BBs deep) but will three bet my best high card suited rundowns (but they don't have to be double suited - to wait for that I'd die of old age!) in order to have some balance.

The CO and to a lessor extent the HJ are spots I like to raise or reraise a bit lighter than on the button simply to get the best position post flop. Here I'd probably put in that initial 3 bet but not always as this hand plays well multiway and letting the loose button in puts some handcuffs on the solid UTG raiser.

For me to put in the back-raise I'd probably want to turn the eight into a queen ten or king giving me a stronger rundown or double suited kings with an ace. Per my not so nimble calculations the back raise would be to 75 BBs and two opponents would probably call putting 240 BBs in the pot leaving 75 BBs behind. You would really have to miss the flop to get away from any flop wager but could get away from some at this stack depth (but not at 100 BBs).

I'm only a part time player and play a style that gives up some pre-flop equity by keeping the pots smaller and focusing on post flop where most of my opponents tend to make huge mistakes. This reduces swings at some cost of equity but fits my personality and relatively modest bankroll (about 20K of poker money that is somewhat replaceable).

Looking forward to what the top posters think but figure I'll throw one in to start.

My initial thoughts without seeing spoiler was to 3b.

I would elect to flat if game was super fishy and we are going mass multi way to flops a lot even after 3betting.

I wouldn't like to backslam as usually villain only 3b AAXX and super primo Broadway, we will see high % 5b and be getting tonnes of money in behind.