Personally, I feel the list from best to worst is (disclaimer: this is not an end-all be-all tier list. Just my current opinions on the characters.)
-Parasite Weave
-Wulfsbane
-Epic Sax
-Diva Intervention
-Primed
-Harlequin
-Poltergust
-Untouchable
-Silent Kill
-Raw Nerve
-Immoral Fiber
Considering of these fighters PW is the only one with a free stun infinite (with enough crit) and bleed is the second strongest status now thanks to the new PF system I can't really contest her position. WB and ES are probably interchangable, but I gave WB the upper position because command grabs give him a slightly more guaranteed option BB's noise cancel is still good, and both have strong damage and combos. DI and Primed I went back and forth on but felt the infinite DI can do is more of a free win than, and she can still enrage and bleed, but has to RNG into it. They're very close though, since Primed's enrage stack usually lets her secure a KO easy. HQ I'm comfortable putting there, the combination of raw stats and good support SA that helps herself as well is nice. While Poltergust's SA1 isn't so good, 100% extra BB damage is pretty significant and whither means you won't be counter BB3'd for free. They might not seem like they go together, but it's still much better than the bottom four. SK and UT I went back and forth on. UT can save you from a mistake with her ability, and still has reasonable attack (4.8k, vs SK's 4.1K). SK has a good counter ability for some characters, but suffers from both being a Valentine and being outclassed by Doublicious SA wise. Raw Nerv is okay, but you really don't want to be getting hit. Her SA is more of something to fall back on. But it can still save you at times, which is more than IF can say. IF has to die to do anything SA wise. There is a kamikaze strat you can use, but it requites a full team, and I'm rating these off of individual power (For a perfect team HQ and SK would go up a bit).I would recommend throwing in this PF cause Doublicious is the better prize, and with an extra you can evolve her to gold.
Keep in mind this doesn't consider loadouts and move stats. A well built Immoral Fiber is going to do better than a poorly built Parasite Weave, and a poorly built Parasite Weave isn't going to be that much better than a poorly built Immoral Fiber.