Hey, I tested buffed YJ's Slow mechanic against act 6 the Champion boss and it did not stop him to gain unstoppable and therefore regen. To be precise he was Slowed so I could hit him but he still had unstoppable buff and therefore was regenerating all the timw. I understand that he has extra ability accuracy but if that's the explanation then how Spider-Gwen and Stealth Spidey are able to SOLO him by applying slow and preventing unstoppable and regeneration? There are vids on youtube.