Disc legendary for Mythic plus?

Classes Priest
1

I’ve rerolled disc and am loving healing, so I’m working on a legendary for the spec. My guild is done raiding until 9.1 so I’m focusing on mythics mostly, which legendary should I go for?

I was thinking maybe making Twin Sun Priestess? But I pug a lot so idk how valuable it would be

2

That’s the one. Done and done.

3

until 9.1 whereas the kyrian one will drop your boon down and might well be the go to.