I use dark seal for tough to stick stuff on pil, mostly. That or the super magic bursted Drain II but the Last Resort group 1 and Desperate Blows group II should be a lock. You can get away with 3/5 desperate if you are going to have hasso or haste samba up full time. I still went 5/5 desp blows for the times it's prudent to seigan/third eye (then I can keep the 25% JA haste with shadows up, and only lose the str/acc from hasso). I recommend 5/5 DB but SOME others will tell you otherwise.
5/5 LR effect and timer.
5/5 DB for sure. 5/5 lets you cap JA haste and ride Seigan or use other subs and still cap.
AF2+2a Feet might alter that to 4/5 if it indeed is a delay enhancement. (6.25% per merit or something along those lines) But that would be for Apoc users only since other DRKs will want haste on their feet.
5/5 DE would be my recommendation for the 2nd set, even with excellent gear and Apoc I've parsed in the mid 80s for ACC on some harder VW mobs. The HP loss shouldn't be a problem with proper sets and temps. Muted Soul and Dark Seal have extremely limited use.
After I finish AF2+2a feet I'll work on hands to test what Augments DE actually does.