I resubbed because you don’t even need to group, what so ever. If you have a lot of time and are able to grind money (or have more money than sense in real life and just buy wow tokens)…
I asked on an unofficial WoW discord server how true that is (there is one with blizzard staff that is part of the discord), and apparently it is actually true, that entire post (at the bottom) in that thread I linked is accurate.
Need to be really overgeared, but easily done if given…again…time and money. Then just solo mythic 0 as a tank class (has to be a tank class) and get some of the best gear available through the vault item thing (edit: plus upgrading it to tier sets or something, either way…), a lot of it is RNG and relying on drops (hence time+money).
But this has been the best patch for casuals, hence why I came back