I have a paladin and 4x druid team. Healing is a simple cast sequence for my paladin.
/target paladin
/castsequence reset=target rejuv,lifebloom,regrowth,lifebloom,lifebloom

Then for self healing or target healing I have
/castseqence reset=target lifebloom,rejuv,

So if the druid has a mob targeted, he will self heal. Or I can target a player with my paladin, press my assist macro, and heal them.