In case you missed it, there's a strategy over here: https://www.wowhead.com/npc=234435/xelanegh-the-many#comments:id=6073539
Elite
Xel'anegh the Many
Xel'anegh the Many is an Elite Aberration, level 70 to 80, hostile to players.
Details
Xel'anegh the Many at a Glance
Level and Map Tracking
The game data tunes Xel'anegh the Many for levels 70 to 80, The War Within content.
In the Client Files
Also Monster Aberration at levels 70 to 80 in the current client data
3D Model
First-party render from the game files. Model © Blizzard Entertainment.
Community notes from Wowhead · 2 comments
The comments below were written by Wowhead users. They are community notes, not TheWoWDB comments. See them in context on Wowhead.
Trying to solo on under geared fury warrior. Wasn't successful. Brann as tank, he'd just die. Brann as healer I got to 75%. Brann as dps was useless.
4 smaller worms and one momma worm. when you attack one, they move over and stack on that worm. Moving to keep them separated seems important.
One worm will start a channeled spell. Feels like this needs to be interrupted. Usually the worm that's on the other side of the room.