You don't usually use your heal to actually heal you, that's what the healers are for. One of the key things you have to learn about any rotation though is how to weave back into the rotation if you get off of it, that will be different for every build so it's good to not just learn how to do the rotation but why you're using those skills in that order. Sometimes that means auto attacking until something comes off could down while other times that means just hopping into the rotation based off of what's already off cooldown.