I've been playing a lot of heads up PLO lately and I'm not doing so hot.

I know in NLHE heads up you want to play a ton of hands on the button and a portion less OOP.

With PLO I'm noticing people play way less hands HU. I'm not sure if this is optimal or just the people I'm playing against. I've been playing close to 70%+ hands on the button and it is constantly getting me in trouble. I'm also having troubles 3-handed and 4-handed. What percentage of hands should I be playing preflop and what am I looking for in a good hand?