So I simulate how it goes after the nerf. Basically, it kinda sucks
no more 1k+ matk from annihilator
-75% shellbreak armor break rate instead of 100%
-you wouldn't be able to use energy control as your defensive skill, you'll need to use siphon barrier instead, you'll also get e burst stack
-You'll need an e burst sword stacking combo, 2 stacks is the minimum to unleash instant reunion, 3 stacks would give you max damage of Enchanted burst itself
-The stacking combo uses up magic proration so you'll need to prorate
So a high budget KMD would have about the same dps as mid budget katana. And don't even think about low budget build. It will be underwhelming. Now MW will become Mediocre Warrior again. You might as well go with Int str build so you can just go untouched with brave aura and nuke bosses