85+? I think it's completely doable. Remember they lowered HP on mobs and basically 2.4 GR80 = 2.3 GR70~. Add augmenting stats on gear which pretty much equals hundreds of paragon per piece. Try it solo with any of your old chars and u will see. My barbs/dhs can speedrun around 10GRs more than what they used to. My mixed SC party was doing 70+ back in 2.3 and ET Wizards are way more powerful than what SC monk was. Pretty sure we will be doing 85+ in no time.

I'm gonna start playing solo my Wizard to boost it to Paragon 1200+ and work on 90+ gems with all augmented gear. Once I get that, the supports wont really matter how high their paragon is. Trust me, 85+ won't be a problem.