i feel like the hellfire citadel trinkets, even at mythic quality, will not beat mythic BRF trinkets.
if you have heroic spirit trinkets, the leech trinket WILL beat shielding talisman however if you have mythic BRF trinkets nothing beats them. while geodew's math may say otherwise, and i'm sure we can all agree we are thankful to him for helping every single 1 of us, the reality is that spirit is so strong for MWs that the healing output you do is centred wholly, more so than any other healer, around your unbuffed spirit
sure you can argue "lose 300 spirit for 280 int and mana cost reduction" but you wont see a hps increase. the insane spirit values we can achieve in full HFC mythic gear w/ mythic WF brf trinkets (3.1-3.2k) would basically allow us, in an 8 minute fight, to have around 65-70% uptime on RJW. that hps is simply unmatched by anything offered in HFC. the leech trinket *was* overpowered, and it was *too much* but they nerfed it into a very bad spot imo, which i'm kinda glad about because progression races shouldn't be based off which guild got OP trinkets. this was the latest log for our mythic tests (take from it what you will):
https://www.warcraftlogs.com/reports...ing&by=ability and leech healed, across all wipes, 4.41m or 1.26% of overall healing done. for socrethar i was the only person using the leech trinket afaik. similarly, you can see that across all wipes i was the highest healer on it (which would also boost the leech trinket's value considerably). it's because of this i just think we're "better off" using double spirit BRF trinkets. i actually decided to test the possible longevetiy i could achieve using autoclave + phylactery vs autoclave + shield talisman:
with autoclave + phylactery i went oom after 5:25 and i had a 39% uptime on RJW, however
when i used autoclave + shield talisman i couldn't go oom. i eventually gave up and died to the tanking dummy after 17:45~ (hilariously having a higher uptime on RJW too). another important factor is that with our 2/4pc, we want to cast more uplifts during the extend life duration. in order to do this we have to spam RJW more, and cast surging mist a lot more. to do this we need a lot of spirit.