I agree to not put Moira with Lucio in “A” tier
But I wouldnt exactly expect to see Mercy regularly out dueling her either. Even with her ability to crit, even at high levels of play, my money is going on Moira over Mercy the overwhelming majority of the time.
Moira is evasive and difficult to kill. She leaches life as she doles out damage. And her primary damage, while not particularly high, is consistent. She is going to do 65 damage per second to you. If she chucks out an orb (and you dont have some defensive option at your disposal), she is going to do 115 damage per second to you.
She doesnt have the ceiling some other heroes do (Which is why I would never put her up at the top), but her “floor” is never as low as theirs either- And theres some big merit to that.
Id put Moira in B tier, personally. Not meta, not “great”, but never terrible either.
Edit: For funsies if I made my own tier list:
S: Bap, Zen, Lucio
A: Ana, Brig, Illari
B: Juno, Moira
C: Life weaver
D: Mercy.
Bap zen and lucio i feel are “consistently” the most threatening supports across the course of a match. These guys are doling out a lot of pressure, constantly. Theyre tough to kill and dole out a huge amount of damage, fast.
Heroes like Ana, brig, and illari are all deadly- But I feel they have more nuance to when/where theyre lethal.
Moira is neither strong, nor weak when it comes to dueling to me. Again she lacks the ability to headshot (though can “kinda” simulate the same effect with a damage orb), but shes never going to “whiff” her damage either. Her strength, and weakness, is middle ground consistency.
Juno is almost an A tier hero to me. Shes got great mobility and is super evasive. Speed ring can let her escape almost any fight, or follow up on any target if theyre low. Her pulsars can work as good openers to ensure you start the fight missing a chunk of health, or secure an elimination in an impressive amount of situations.
But she lacks an “edge” to her. She has no means to heal herself mid fight. Her damage, while nothing to scoff at if shes landing all her shots, lacks any spike damage from a headshot and if youre zigging/zagging shell likely miss at least a few shots in her burst, again removing the edge off her damage. So ya- Nothing to scoff at, but not as fear-inspiring as the bigger on this list.
Life weaver is… niche. His damage can actually be surprisingly high. Hes slippery with his dash and petal. Buuuut 90% of the time hes stuck doling out petals, and it takes him a moment to swap over. Overall, not super threatening.
And mercy is mercy. Her pistol can also be surprising at times- But even with its larger hitbox, its still a slow firing relatively slow moving projectile weapon. It takes a long time to swap to it. Has limited ammo. She cant heal herself on demand. Etc. The nature of her kit means shell be on her staff even more than weaver is on his blossoms. Little threat.