I was one of the weirdos who liked SB DRK. Basically imagine drk as it currently is but bloodweapon gave an attack speed buff and lasted longer, and delrium extended the duration. Class got memed on for just "spamming dark arts", and I will admit you did press a lot of dark arts (about 8-10 casts per min so about double the rate of edge of shadow), it was essentially what edge of shadow is now, but instead of being straight up damage, it buffed your next attack in some way, and it was able to be pressed way way more frequently. The class itself was fun to play because it was a rescource management job the other way round, instead of having a limited amount of rescource you slowly built, your resource built way too fast and you were constantly having to dump it, which made it incredibly satisfying when you could line up your mana and blood to maximise a trick window. I always described it as having 2 settings, Blend, and blend harder. It was also more interesting to play in dungeons than the other 2 imo, cos your feedback loop of abyssal drain -> quietus -> tbn -> abyssal drain was fun AF. There was also a fair few neat optimisations you could do using dark passenger for snap aggro on an add as a dps gain, and your powerslash combo being so powerful aggro wise meant you legit never need a tank stance even with no ninja. I understand it wasnt that popular so it got changed, but nothing quite feels like it now, especially as none of the tanks have a haste buff now.
I also liked HW machinist, the cast times just didnt bother me, and if you stacked your ammo right you basically had free mobility when you needed it anyway, pluss the wildfire burst when done right was super satisfying, also just liked that you just shot things a lot with your gun, I'm a sucker for that and the more technomancer approach to mch these days just doesn't appeal to me.