Earth Shield + lvl 1 Healing WaveFollow

So I just discovered the Healing Wave effect (I know, I know, I'm a slow learner! -- always had gone with the "more mana efficient" Chain Heal).

On last night's Shadowlab run, it appeared that the Earthshield was healing the tank for 760 a pop. Is that from: (1) my +heal, which is about 1600, (2) the +heal from WoA totem, or (3) the +18% from Healing Wave (I was pinging the lvl 1 Healing Wave to keep the buff up). Or did it take all three? At any rate, it made Earth Shield so effective that it really saved mana.

It's from your +healing which includes WoA--and which is why you should always drop WoA before Earth Shield if feasible. SkibumOnShiva is spot on: both Earth Shield and Healing Stream only take your +healing into account when you cast the spell, so you can artificially boost them with trinkets; I still have my Zandalarian Hero Charm for that purpose.

The Healing Way effect ONLY affects Healing Wave, but it's still a great idea to use rank 1 (or rank 2, since rank 1's 1 second cast is actually faster than the GCD) to keep the effect up and for a chance to proc Ancestral healing.