Oh man, I massively respect that post, DSM. You put a lot of effort into that, I can tell. You deserve an equally thoughtful response. I'm sure you'll want to make some revisions in response to critiques - do you want to put that on the wiki somewhere? If nowhere else, maybe under your "talk" page? For example, here's mine:
https://wiki.project1999.com/User_talk:Bcbrown
I'm going to give you a full thoughtful response later, but here's a couple of quick points of feedback:
On level 39, you mention CH efficiency against a monk, but it should be calculated against a typical enchanter charm pet - probably more like 2-4x the hp? You mention CH at 40% - my experience (City of Mist, goos, high 40s, tank with 2.5-3.5k hp), I start casting more like around 30%, with the aim of it landing around 20% hp +/- 5% - if it lands at >25%, it was too early, if it lands at <15%, it's playing dice with my tank's life.
Second, the regen line isn't very compelling in a caster group. Solo or duo/trio with a tank, it's the best, most efficient way to heal. Solo on a shaman, you obviously always want to keep regen up for canni. Solo on a druid, you can use regen to heal on the occasion you get slapped around while charming or root rotting, because sow/snare/gate means you're rarely at risk of dying from a damage spike. But when you're healing enchanters with hasted torched pets, they need to worry about damage spikes, so an immediate heal is better than a more-efficient, slower regen over time.
HP buffs while leveling - you're talking about Symbol but I don't think you're taking into account Daring/Valor/Resolution.
Dot clicky/dps: dot's don't help if you're chewing through mobs. Better comparison would be shaman/cleric nukes if there's spare mana.