alright, if ever there were a build that fitted my OP this is it, i bring to you:
Karen Nur the Grundle Swopper: https://www.grimtools.com/calc/4NOmK3vV
the build is both a silly concept, “doesn’t work”, GDstashed/green, inferior to a real/actual Rah’bringer Witchblade, and too squishy to handle sr75 in any reliable/farm matter (65 is good tho 
)
-despite seemingly low RR and poor application it actually chewed through any boss on 75/76 and even Benny on 80, (at least the ones that didn’t 1shot it cough *Maiden *cough), boss rooms being a breeze but it death cycling during chunks 
The idea behind this absurd thing was to “exploit” weapon swap, yes you heard right, click the weapon swap button in the build and see for yourself 
conversation in Discord raised the question if Grundleplith could be used for something decent; when Jens popped the idea of CDR Fighting Spirit. Now in itself Grundleplith is a pretty meh weap(i haven’t been able to use it in any decent manner at least), so the question arose if the CDR could be “abused” without actually using the weapons ? 
Turns out, you can 
At least it went smooth and great in mild testing/in a controlled environment; and here is where the build concept completely falls apart
It’s way too clunky to use in actual combat, at least i’m not good enough to do it manually, and i don’t know if Grim Internals can do some jazz and help on that (i dont’ use GI)
The idea was when fighting spirit procs, you wait until like ½sec before buff expires, quick swap to dual Grundleplith Tails, and quickly swap back as CD sets in, voila 6sec Fighting Spirit CDR
If you can manage to pull it off/practice and make it work, while fighting more than a handful of zomboids outside DC, it can provide a nice little extra chunk of dmg boost from the Naren Kur mods
Like i said, sadly i can’t do it/too clunky for manual paying attention and proper timed swap, so have fun trying see if you can to take advantage of this, gl 