Warlock infections power drain opponent.. Ultron regen back some of the energy damage, both are bleed poison immune.. but Ultron has regen at 50% and 25%.. even after the Ultron buff was corrected, he still feels good.. maybe not BGT level, but still good.
Ultron is now having real damage which is next to nothing. Warlock is much better
It's crazy how after bug fix warlock is preferred more than ultron and it's not even close