Hey just wanted to clarify something without adding clutter to the thread.
In regards to Tree of Life. Its sort of a a Hybrid between an Aoe CD and either a throughput CD or a mana regen CD.
It is an aoe CD in one respect only, it increases WG from 6 targets to 8: a 33% increase. Given the WG CD, In casts you get 6 extra targets over the duration of Tree of life. (cast 3, get 1 for free...over 30 secs)
The playstyle you described, which is spread LB across raid targets and use Regrowths on Omen of Clarity procs is the mana regen CD method. It's an HPS loss compared to the throughput method - and as such is hardly used anymore (was more common at the start of MoP when mana was tighter). Not sure if you are aware but the Lifeblooms from Tree of life have 1/10 the normal % chance to proc omen of clarity. So its not like you are flooded in them.
The throughput method is to just cast your heals as normal and benefit from the 15% increased healing. Spreading those stronger rejuvs around is much more useful than the LB casts. With the meta gem and plent of mana regen, its easy enough to spam some rejuvs out during the duration of the CD (was alot harder to do that early in MoP - hence the mana regen style above)
So in reality its almost exactly like wings for a pally (a straight up throughput CD but 15% instead of 20%) with 2 perks: WG hits 2 more targets and Regrowth procs can be cast while moving (given that its already a 1.5 sec cast before haste, its not usually hard to squeeze those in anyhow - more a pvp use but not relevant here for raiding)
Hence why I suggested putting ToL in a throughput CD category (with perhaps a disclaimer) - its not strictly that, as we do get some aoe from it, but its mostly that. (like many druid things, its a hybrid that gives several options in 1 button)
A side note is that unless you need a throughput CD - most druids use Soul of the Forest which ups your normal WG healing by a metric fuckton
- the only fight i swap to Tree is Garrosh, since the only hard part to healing are the whirlings.
Also - regarind Riptide, treat it just like holy shock. You hit it on CD because its cheap, instant, decently efficient, and most importantly generates a resource. HP for shock, tidal waves for Riptide. Also you can think of it just like ReM for the same reasons, on top of you want 3 riptides out so you have targets to bounce chain heal off of, much like ReM for Uplift. - So Riptide is Holy ReM