Remember the Titans

As of Shadowlands this achievement is pretty easy, just afk for 6 minutes without killing all the Torment adds and then nuke the boss.

Note that this achievement is very hard to solo, you will need one more player to get aggro on one Mother and keep it away from the other one to remove the [spell=253189] buff.

Tip: To avoid damage, you can crowd control the [spell=245910] by using abilities such as [spell=710], Freezing Trap or Entangling Roots.

Very easy now in Dragonflight. Just wait until all torments are there, then kill the boss. [spell=253189] does not seem to exist anymore.

Easy Solo for Pet Classes Level 120 Battle for Azeroth and Level 60 Shadowlands and Beyond...

1. Normal Difficulty.

2. Begin fight, doesn't matter which you target, one will teleport to the corner, and the other two have to be split by you and your pet.

3. Maintain aggro on your target on your pet, and use aoe attacks, because now the other one will be following you.

4. Move away while keeping your pet on your original target, and the other one now on you and they are finally split.

5. There are Four Torments:

Machinations of Aman'Thul will spawn multiple Torment of Aman'Thul adds. You need to keep one alive.

Fury of Golganneth will spawn Torment of Golganneth adds. You need to keep one alive.

Flames of Khaz'goroth will summon Torment of Khaz'goroth adds. You need to keep one alive.

Spectral Army of Norgannon will spawn a large amount of Torment of Norgannon adds. You need to keep at a minimum one alive.

6. They will be in a random rotation. Again, upon each torment, you must keep at the very least ONE add up and do not kill it. For me, the spectral army was my last one so I kept them all alive while I focused on the boss.

7. All the while, make sure the bosses are split. No worries if they move close to one another, you can always split them up again, but DO NOT accidentally kill a sole remaining Torment add if there is only one up.

8. With all Four Torment adds alive, kill the bosses.

9. ?

10. Profit. Achievement Completed.