ok so this is a 5/5/10 on the button PLO game, stacks usually get pretty deep.

 info on villain: seems crazy, lots of table talking, loves to bet pot verbally. sometimes will airball the flop but tightens up his bets as pots get bigger. one piece of info relevant to this hand is that villain sometimes doesn't check his holecards until later streets of hands. and pretty frequently will double check his cards throughout the hand as a lot of fish do in plo.

 villain is HJ 2k+

hero is BB 1.5k

preflop: SB calls, I complete BB for 5 with 5d5h3d4h, two other calls including villain, button checks his option.

 flop: 4s5s8c

checked around.

 turn: Jh

sb leads for 25, I make it 100, villain verbally pots to 395. sb folds, I call.

 river: Ac

I check, villain verbally pots putting me all in for ~1100.

what do we make of this guys? those of you with live plo experience, what is an accurate range that we can assign to villain here?

Edit: to add more info, I was pretty lost ott because I wasn't sure if villain had checked his cards on the flop. the only way villain could have nuts after taking the line he took is if he DID NOT check his cards until the turn.