Some hotfixes have been pushed to live servers which applies tuning hotfixes to Neltharus Mythic+ including Chain damage, «Melt» Casters and Burning Chains. Thanks to Dorovon for helping identify some of these hotfixes.
Neltharus Mythic+ Hotfixes MagmatuskHere are the nerfs to Magmatusk this week. The cheese has been fixed but the boss nerfed overall to compensate.
Magmatusk:Draconic Tincture no longer appears in Mythic+ difficulty. Magma Eruption damage reduced by 20% Lava Spray damage reduced by 15% TrashHere are the nerfs to trash. Rather than nerfing the damage of troublesome trash mobs, it seems that Blizzard has nerfed the health which will make them die faster, but not really reduce their deadliness otherwise. In addition, players should be way more free to use the Burning Chains to speed up the run now as it's way less likely to one shot players who use it.
Forgewrought Monstrosity (mobs that pulse AoE in Forgemaster Area that are banned)Health reduced by 25% Lava Flare (mobs that cast Melt)Health reduced by 20% Burning Chains (environment chains that do big damage)Damage dealt to players reduced by 25%. Enemies seem unaffected Variance reduced to 0 (was 0.032) Read more on wowhead.com