A general rule for new players to PLO to follow that will help is don't 3bet AA pre unless you can get more than 1/3rd of your stack in.
Question Cos- do you 4 bet much for balance seeing as whenever there's a 4 bet people auto assume its Aces?
I don't ever 4b/fold pre in PLO because I'll always be 4betting hands that have too much equity to fold. I don't 4bet much without them aces and when I do it'll be with super premium hands, usually with blockers to AA. Hands like AKQds or AKKx. I usually flat hands like AQJ10 etc but I sometimes gravitate to 4-betting them vs loose 3bettors.
I'm gonna nick most of this answer from a chat between me and little dave because he can put it into words about 150x better than me.
To hold em players, a balanced range is a non-polarised range incl. premium value, thiner value and air but that isn't how you balance a preflop range in PLO. We are always going to be kinda polarised because we're always going to be 3 and 4betting premium hands.
PLO is more equity based so a balanced range is opening good ranges from every position and 4betting enough of that range to make you non-exploitable OOP