I was hoping you'd give your opinion on resto druid legendaries that best suit the raid ! But thanks for the detailed post !
And again Holy Priests are outsiders. Harmonious Apparatus is overestimated. Night Fae for Holy Priests is underestimated.By calculations Harmonious Apparatus gives only 2% for low cooldown spells rotation and 4% for whole rotation (including Salvation and Hymn).X'anshi, Return of Archbishop Benedictus looks more interesting considering free spells for 10 sec (and I haven't tested yet how much mana you get when you are returned back to life). So you can use Prayer of Healing more aggressively.Night Fae gives a lot because you can: 1) make lower your divine hymn cooldown (or cooldown for any damage dealer in the raid or party) which is in average (by calculation) gives more healing than, for example, Kyrian Ascended Boon, 2) make buff for 10% less taken damage to a tank which can actually be counted to your HPS. Also you get the blink which can help in a lot of situations where, for example, Kyrian vial will be useless (because when you are dead you can't use any vials).Later, you'll be able to give 5% haste constant (on average) buff for 2 of your party/raid members thanks to Nyia's last ability. This is much better than some covenant 3% buff to yourself (and often even less, and random).Talking about mobility I can't see which discipline "hardest hitting heals" can be cast while running. May be Rupture (with 90 sec cd)? But we have Holy words in Holy and can cast CoH, PoM or Renew while running. I've played some healers (besides priest) and wouldn't say that they are much more mobile (with their hard hitting non-cd heals). Even druid can't cast Regrowth while running, only Rejuvenation (kind of Renew of Holy Priests) and Swiftmend (with not really short cooldown of 15 sec).