problem with sac is you cant dispel when you are cced and you lose the 200k shield that you need vs cleaves..
because the times i have to dispel my healer i'm usually in a stun or silence, else i would just use gateway or teleport and wouldn't needa dispel on my healer
You can still have an imp out so you can dispel while CC'd, but you can also sac-redispel if you hit hunter's mark etc. (unless they changed the resetting cooldown). You can also still sac pact, since pet resummon is on the same CD as sac pact.