A core choice at the start of your journey in the Shadowlands will have you decide where your allegiance lies; would you rather support the Kyrian of Bastion, the Necrolords of Maldraxxus, the Night Fae of Ardenweald, or the Venthyr of Revendreth?
Choosing a covenant is the most important decision your character will make in Shadowlands, as the covenant abilities and Soulbinds will significantly impact your spec's gameplay and performance. Through this choice, your rotation changes, certain bonuses appear in dungeons for your entire group, and you are able to follow the story in different paths.
So without any further ado let's get right into it;
Currently Night Fae is by far the best covenant option for Havoc Demon Hunter. The damage offered from The Hunt and how strong Night Fae Soulbinds are for Havoc Demon Hunter makes Night Fae your strongest option by far.
AoE / Mythic +:
For Mythic + it is no different, with the changes to The Hunt conduit in 9.1 focusing the increased damage on the DoT instead of the initial hit, and how strong the Soulbind Korayn is for AoE scenarios makes Night Fae again the best Mythic + / AoE covenant for Havoc Demon Hunter and should be your only go to option.
All aspects of the game are dominated by Night Fae for Havoc Demon Hunter and PvP is no different, the burst damage offered from the Night Fae signature ability The Hunt makes it the strongest and best option for PvP and should always be chosen.
To sum this up, currently for all aspects of the game Night Fae dominates the Havoc Demon Hunter best covenant choice, for Single Target with the Soulbind Niya, AoE with the Soulbind Korayn and PvP with the burst damage from the Hunt, making Night Fae your best and only option for Havoc Demon Hunter.
Unfortunately Vengeance doesn't have much choice when it comes to the covenants and Kyrian will be your go to covenant of choice since no other covenant brings anything better to the table when it comes to playing Vengeance Demon Hunter.
AoE / Mythic +:
This goes for Mythic + as well, Kyrian is the only viable option for Vengeance Demon Hunter and should always be picked regardless of what content you are doing with Vengeance Demon Hunter.
Covenants have a major impact on the game, your playstyle, rotation and even character aesthetics. You should consider all your options before committing to one covenant.
But also remember you can switch between covenants so if you would like to change between them you can!
As of current there is a time gate on how you can switch covenants but with the release of patch 9.1.5 it will be much easier
Remember! You will lose access to all your previous Covenant’s abilities, transmogs, and soulbinds
It is a bit tricker to rejoin a covenant you have already left and it will require a bit more work. In this case, you will need to complete two consecutive weekly quests before you will be allowed to rejoin.
The leader will then give you a weekly quest to start the process of rejoining the Covenant by completing quests in the covenant zone or dungeons and you will see the progress bar fill up as you finish various tasks.
Once you finished the quest and the Weekly Reset has happened you will be given yet another quest, the objective of the quest is pretty much the same then you will be able to rejoin the covenant.
In total it takes about one weekly reset to rejoin a covenant you previously left, so make wise choices!