Who was your game changer?
There is always a point in any video game where you finally reach a point and wither get a specific item or in this case a champion that just allows you to smash through content that previously had you blocked.
I remember I was stuck trying to get through act 4 for so long that I just left it alone and focused on the event quests then I duped my 4* wolverine and suddenly it was done.
Then from that my 5*s started to fall into place and its just kept rolling from that point on.
What about anyone else?