It's just a case of knowing when to use all your skills. It's mostly about not spamming it or using it before a Tank pulled a mob. For adds you need to learn when adds will spawn to max your heals without pulling aggro. Stoneskin is a wonderful skill for this. It will grant a few seconds for the Tank to get aggro on adds without needing a heal and then you can go ahead and use whatever skill you want. On the above Garuda example Healers often get the first aggro from the Garuda clones anyway and you can use shroud to drop it.

With everything you can use it just never overheal and spam skills.