Thanks for the advice. I'll try to reforge for crit - Mr. Robot still leaves me around 50% mastery under the crit build and gives me a bunch more crit to work with, which is nice. I do always carry mana pots with me, but I could and probably should work on Totemic Recall timing and training myself to drop MTT earlier. With any luck my overall throughput won't take too much of a hit from this.
Also, back during DS, I used to have a weakaura set up to yell at me when I was sitting at about 60% mana- to let me know to drop MTT. I'd never run OOM (still don't). At a certain point in gear, healing wavex2 is better than GHW and it's mana neutral at that point.
My normal rule when I raid on this one:
CH: "Are more than 3 people taking damage?"
If no: riptide one, healing wavex2 on another, riptide another one, healing wavex2 on the next
If yes: RT, CH
On HR: Is big AOE damage about to go out or are the melee about to be standing in something?
If yes: Unleash/HR
If no: I wait
On cooldowns: I use ascension first, then I use HTT, if we're stacked, I use SLT/HR/CH. Meaning, I rotate them so I always have one available when I need it. The rotation rule changes depending on the fight. For instance, the first boss in HoF- I call out for HTT on the first attenuation (I use my priest for the guild's 10m runs- but the other healer is our shaman).
Though I've learned to accept that- unless Bliz gives us another DS gimmick raid, I'm not gonna be top heals. Though I'm not worried about my HPS in that regard. I just heal cause I enjoy it (shammy heals on my goblin is fun).
By the way Theo- we're on the same server /wave.