6.2 Sinister is the worst piece of game design I have encountered so far - I can't comment on the Champion fight because Kabam's awful game design on this boss means I can't progress without any of the very few counter champions. So stupid that it is so specific to having certain champions/synergies, yet you can't bring in 4*s.I have a 9.5k prestige account yet I am having to wait until I can pull a suitable counter as I don't have CMM, Heimdall, Hyperion or Warlock as a 5* or 6*.If I could just chuck in my 4* Heimdall I'd be able to progress.