Bro I'm paragon and almost valiant and u would roll me in bgs(if u don't know how to play against enchantress gl against my 6* r1 enchantress) LOL
I'm sorry to be harsh, but with that roster you should have absolutely no trouble getting through act 6, or anything after for that matter. My recommendations are master playing Onslaught, rank up Mr. Sinister and Kate Bishop, and watch MCOC Encyclopedia, he'll help you through all the act content. Use boosts if you still need help.