hey Ghostfang here
when I first got Mists of Pandaria I was looking for a way to solo large groups of at level mobs without having to take brakes in between having only an elemental shaman at level 90 and not wanting to level up tank classes decided I'd work with what I had. then I noticed the talent named Conductivity - Spell - World of Warcraft. I started looking at other talents and glyphs that compliment it there is one in particular that is excellent for it and that's Echo of the Elements - Spell - World of Warcraft
.an elemental shaman you already have your mastery which basically does that same thing only with damaging moves this also works on heals. with these two talents
you can solo large groups of mobs by only using chain lightning and healing rain under you without having your health get lower then 95% while healing rain is up. it works quite well with farming outcast sprites for motes.
later on I had a friend who used the same talents but as enhancement. I asked him if we could do a dungeon to try out the healing potential of our builds without a healer. and we ended up going through both SM heroics without a healer by placing healing rain down near the tank asking everyone to stack used the moves connected to conductivity.
things that may help you as 'healemental' or 'healenhance' along with the other things I liste are
Elemental Blast - Spell - World of Warcraft for single targets
Glyph of Chain Lightning - Spell - World of Warcraft for mulitple targets
Glyph of Healing Storm - Spell - World of Warcraft for healenhance
Elemental Focus - Spell - World of Warcraft as healemental (normal ability)
try it for yourself to solo farm or find a friend whose willing to try this out!