The Tzeentchian Twins weekly event is interesting, but I feel like the number of splits makes the event a slog and boring. I played three matches on Legend with a competent team and it wasn’t particularly difficult, just very long and I found myself yawning and counting down the minutes until the end of the level. The team needed to complete it 6 times but we got half way and couldn’t be convinced to run it three more times that night.
Rather than have every single enemy split, I think the event should be adjusted either in limiting the number of splits (e.g., an enemy can split only once but into three units) or having only elites and specials split (e.g. clan or slave rats or marauders should not split). Having a rat split into slaves isn’t a new and compelling obstacle. It’s the same enemy with just more health.
Some of the mutators introduced unorthodox and very interesting challenges (no HUD is one of my favorites), Twins is not one of them - short of just making everything take significantly longer and using the exact same approach you always do.