If they don't want to change BW they should just buff duration to 12 seconds. 5 GCDs easy.
Delirium changes will mean that Delirium + BW combo will nerf MP return unless they increase MP return(they won't lol) since Bloodspiller got you 3200 over 4 gcds and Quietus got you 4400 over 4 gcds.
With the incoming nerf you are likely to only get 2400 MP return off of 3 Bloodspiller and 3300 MP return off of Quietus.
If the MP formula stays the same as is DRKS will be regenerating less MP during that window.
It would be forgivable if Darkside costs were reduced to 2400(the OG HW cost lol) instead of remaining at 3000.
