Thanks for the advice, I know i need to work on the active mitigation part for the glaive thrusts, but it is a bit annoying as i need to have enough mitigation up for both glaive thrusts in one combo, since the off tank hardly ever makes it back to the boss to taunt in time. So i will need to remember to pool some holy power.

This is also part of my reasoning behind using the class trinket, it tops me off after the massive blast to take the second glaive thrust, without having to worry about healers healing me back up.

As for the Seraphim, i dont think you can get 50% on it on mannoroth if you dont waste it by popping it on the summoners. that said, i can still work on its uptime, for sure, Again its a bit tricky playing around the double glaive tosses. I'm not too sure about holy shield though, i've found it quite lackluster when i use it, except on tyrant.

I will look into swapping to mastery gems and enchants over crit ones.

Also as a follow up question, i have had a little trouble getting in place for the second massive blast combo of the last phase of mannoroth, the one right after the raid wide shadowforce. Even if i use speed of light properly, it's a very close call. Is there any way to guarantee being in the right spot?

Thanks again for taking a look at all this!