Use next strategy If you struggling to kill him:
1)Attack him with simple AA.
2)Wait for Velen to reaggroing him so he will attack Velen instead of you.
3)Go AFK.Or dps (but make sure that yours threat meter won't reach 100%)
4)When boss have 10% HP - use all burst and kill him.
Elite
Fel Annihilator
The highest voted Wowhead comments for this page. They are community notes, not TheWoWDB comments.
This worked for me thanks, As a mage he would kill me faster then my allies could heal. Was infuriating,
Details
This roster comes from the current game client's data files, so it is not a complete list of every NPC in the game - older world NPCs that are no longer in the modern client are absent.
Community notes from Wowhead · 5 comments
Top 2 shown above · 1 more hereThe comments below were written by Wowhead users. They are community notes, not TheWoWDB comments. See them in context on Wowhead.
Thank you!!! Was infuriating me as well...
Level and Map Tracking
The game data tunes Fel Annihilator for levels 10 to 45, Legion content.