PvE Covenant: Necrolord Legendary: Shadowflame Prism (best leggo by far)
PvP Covenant: Necrolord/Venthyr (Fleshcraft vs Mindgames is a tough decision, I personally like Necro more because I value more pure survivability in 1 v 1 and world pvp, but both are competitive)
Legendary: Sephuz’s Proclamation or Talbadar’s Stratagem (Depends what you’re fighting but generally I’d go Sephuz just because you are gonna be Purging a lot and you’re vulnerable to CC)