Badass Rush To Purity Tips?

I just got back again to Soul Knight after like 3-4 years, right now I'm still struggling with Badass Rush to Purity, so could I ask the best characters to use, as well as some tips and tricks I need to know? (I mainly use Knight with Chaotic Strike and Paladin with Energy Shield, but I've also been using Warliege with his beyblade more)