So last night, I did heroic Nythendra and Il'gynoth.
The talents I used were:
Torrent
Wind Rush Totem
Surge Totem
Deluge
Ancestral Vigor
Cloudburst
Hight Tide
My rotation revolved around the following: Healing Rain > Cloudburst > Healing Stream > Riptide > Gift of the Queen > Healing Wave and Chain Heal when everyone took a hit.
Whenever everything was on cooldown, and 3 to 5 people (out of 30) took a massive hit, it felt wasteful to use a Chain Heal. After that first Tidal Waves buff is used, trying to use a non-buffed Healing Wave feels soooooooo slooooooow (Echo/Crashing Waves in mythic dungeons has spoiled me) - But I kind of think it would be useful to use Crashing Waves in raids until i have the mana/trinkets to abuse Chain Heal more so that my rotation would look more like the following:
Healing Raid > Cloudburst > Healing Stream > Riptide > Gift of the Queen > Healing Wave x2 > Chain Heal as needed
What are your thoughts?