Don't think there is one right answer. If you're the type that likes to retrait for situations, do so. Otherwise, find a build that suits your overall playstyle and don't worry about if it's "right". One suggestion, however, is remove the H4D2.. damage helps your healing output, too. I usually keep D4P2 and H4P2 up and then the others can be swapped. Usually I choose among how many crit defense versus how many crit/mastery (most times crit based on sometimes if you get one heal pulse to crit, all will crit). If you find mitigations work for you instead, go for it.
Sniz(defiler) / Johanson(cappy)