Vashnik the Malignant
After today's hotfixes which nerfed various abilities on the Vashnik encounter, a hotfix had the Mythic mechanic enter Heroic. This has now been reverted, but there's another undocumented change which makes the Vashnik encounter much easier.
Exploding Infection now only applies to 2 players (was up to 5/7) per Infection cast.
This is a massive nerf to one of the most difficult parts of the encounter, the Infection overlaps. When Vashnik activates his Infections, he releases two of three abilities depending on the most recent Imbibed altars.
Red: A soak that deals high damage to all players.
Orange: A set of dispels that deals damage to players when dispelled.
Purple: A healing absorb that needs to be healed off.
All of these are healing challenges, but the orange one was especially difficult because not only did the amount of damage increase with the number of debuffs, but also the coordination challenge of dispelling all the debuffs in the short amount of time. There were previously 5 or 7 debuffs applied which is a lot of healing to get through. With this nerf, the encounter is significantly easier with the orange debuff being significantly less threatening.
