My understanding is that the filtering of procs to say 10% on-hit from 100% on-hit reduces the proc server load by 90% and what was they were initially looking to do. So the boss ward would simply change it to 0% when the boss is already debuff stacked for that proc type for awhile. The procs would never occur, and never hit the proc server.
So boss goes up to 30 vulnerability stacks (first 20 only used for damage amplification) then boss ward or aura or gaurd or pulse disables vulnerability effects raid-wide for 30 seconds while 10 of those stacks decay. Vulnerability property on gear gets effectively disjuncted or has its proc rate set to 0% for 30 seconds. No more vulnerability procs period in raid for 30 seconds are generated, eliminating server load for that proc type for 30 seconds. After that, say vulnerability stacks up to 30 again in 3 seconds, it again gets turned off for 30 seconds.
Overall would eliminate maybe 90% of the debuff and many damage over time procs on bosses in raids. We simply allow every debuff to overstack an additional 30 seconds and decay one at a time but keep the max effectiveness of those debuffs the same, and deactivate those debuffs by setting their proc rate to 0% for 30 seconds when the overstack is full. Maybe have a boss start with a ward that cuts proc rates in half that updates to the dynamic ward as above to reduce initial debuff spike load.
Then for good measure we nerf warlocks. Because I mean, why not?
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They also could just simply release a 15-20x3 Legendary Sword of Shadows.
Or for SWF/TWF remake epic Forrester's Brush Hook to take sentience and have proper damage die for epic versions. Get rid of the Normal/Hard/Elite versions and put 1 version in that works.