Depending on your location I would recommend Unibet as a good room to start. Real soft games there as most players are recreational and the software is nice. They are also in our $55k rake race and you can get some pretty good returns there.

Microgaming is very good for PLO traffic too. I would recommend Betvictor there where you will get rakeback total of 65%+ with rakeback/bonus/points chase.

There is also Natural8 or AllinAsia on GG network which has some super soft PLO games. The software there is really nice too and you will get 35% rakeback there paid weekly for each of those. On AllinAsia you will also get access to other Asian networks where you will find some PLO traffic so that would be a good option for you for sure.