First of all I appreciate work you done on locks for 9.1.0.
There is just a problem with Malefic Wrath legendary, which is very strong, but maintaining its buff is practically impossible in the raid environment (unless you are to a god).
there are 2 challenges: extreme shard management + too much mechanics in raid. Can you consider reducing the buff a bit and making it 2 seconds longer? When I watch replays of those in the top logs… basically they all ignored mechanics and whole raid just help them to “do the logs”.