There is only one rule about Covenant that will always be true:
Covenants are what you MUST pick not what you WANT to pick <<<
So my fellow Warriors , this is the result of watching and reading a lot of findings from Beta. I don’t think things will change since SHADOWLANDS is right around the corner, Here We go:
1) PVP
a) Protection : Sadly the spec still bad for PVP at this time , so don’t bother.
b) Arms : Night Fae OR Necrolords , Fae being must better for Warriors since it gives yet another instant gap closer . Necro shield is still good , but how strong is the Night Fae ability for running away / chasing targets for kills or CC , i see all Arms taking this covenant. Sadly the Kyrian potion ability is turned off in instance PVP , If you plan on only doing WPVP , then going Kyrian is competitive up there with Night Fae.
c) Fury : I am not 100% sure yet , but since Fury remains stronger than Arms in mobility and much less clunky rotation wise. Fury is the ONLY spec in game that has a Covenant that is very strong for PVP and PVE : Venthyr . Night Fae’s ability is still a good call for keeping targets under pressure , but that is a less issue for Fury than Arms. But things will be much clear mid Season 1 SL.
2)PVE
a) Protection : Lets be clear here , Blizzard dose not want to see Warriors in MDI again at least this expansion , so if you want a strong choice for tanking go Blood DK or Protection Paladins , both specs are doing great in M+ and Raids. IF you like me , will STILL Tank on your Warrior no matter what , then here are the best Covenants to pick Necrolords or Venthyr . YES Venthyr , Door of Shadows has the potential to do a lot of skips or help reposition for hard large picks in Mythic+ , but keep in mind this ability might be the worst to use mid combat too. Necrolords shield by it self is really good as an added CD, kill a big trash pack , stand over dead enemies and cast it , go pull that harder trash pack .
b) Arms : Unlike the start of BFA , and with Arms being the spec effected the most with end of Legion GCD changes . There is not even 1 content creator disagree on the fact that you should not play ARMS PVE in Shadowlands before it gets fix ( tbh , REWORKED , FROM SCRATCH ! ) . If you don’t understand why Arms is Bad in PVE here are most reasons : New secondary stat TAXATION system , No more corruption, Rage Generation Vs. Spell Cost = Rage Starving all time , and No more Azerite Armor.
C) Fury : Numbers wise just go Vanthyr , not only that , it makes your smooth rotation even more smoother and working on 55% on your target’s HP boss or trash + IT GENERATES ( not costs ) Rage . But don’t be that silly noob who dose not wanna learn the fast that the teleport ability should only be used outside of combat . Other choices ?
Night Fae ability is 1.5 min use it with every Recklessness , still very good damage and Rage Generation for Mythic+ or Raid fights with adds.
Kyrian ability is 1 min CD , if you take Anger Management talent you can combo these both , giving you 25 range , nice AOE damage AND trash control to help your Tank.
This is everything i have learned up to 7th of sep 2020 , i made this topic cause i felt it is important so that people do not waste time changing covenants and enjoy the expansion.
Last thing is : “i picked X covenant cause i like how the armor looks / the mounts they offer” Is something we will all see next expansion . Try to be friendly please