With this week's affix being Xal'atath's Bargain: Ascendant, here is a list of all available AoE CC that can be used to break the Orbs of Ascendance.
Season 1 Mythic+ Overview Guide
This affix puts out 10 Orbs of Ascendance that need to be handled before their cast goes off. The orbs can be removed a few different ways:
Once an Orb is removed, it grants the party grants bonus movement speed and Haste. With all 10 Orbs of Ascendance removed, the party can gain a max of +20% movement speed and +20% Haste.
The easiest way to handle this affix is to use any AoE CC on as many orbs as possible. The next few sections will cover all AoE CC available with each class.
Death Knights can use Blinding Sleet on any Orbs in front of them. Blood Death Knights also get access to Gorefiend's Grasp which is a very nice way to clear Orbs while grouping mobs.
Demon Hunters have lots at their disposal for this affix. All Demon Hunters have Sigil of Misery and Chaos Nova they can use while Vengeance Demon Hunters also have access to Sigil of Silence and Sigil of Chains. Lastly, whenever Demon Hunters use Metamorphosis, the slam creates a stun effect that will also break Orbs of Ascendance. In most cases, coming with Sigil of Misery, Metamorphosis, and some form of Sigil will be more than enough.
Druids have some good options here as well. Typhoon and Incapacitating Roar are pretty accessible across all Druid specializations and work quite effectively. Balance Druids can use their Solar Beam kick here, though it should only be used as a last resort since we want to save this for other dangerous mob casts in Dungeons.
Evokers have both Tail Swipe and Wing Buffet at their disposal while Augmentation can also make use of Upheaval in certain situations. For