This might be obvious to some, but a lot of players transitioning to PLO don't pay close enough attention to the structure of their double paired combos. The higher the largest pair, the better. The more suits, the better. The more connected, the better! For example, 8877ds is going to be a little bit stronger than say JJ33ss. Pay attention to the structure of your double pair and you'll be playing those types of combos more efficiently in no time!