Well, you can do GR60 with every class in HC or Solo, and it should be pretty easy.
What I would do if I were you is simply keep speed farming for that gear and paragon levels. If you can do GR35, that means you can speed farm T6-T7 efficiently. Keep doing that until you notice you are clearing GR40-45, then up your speed farm level to Torment 8-9.
That is the process most of us take, and at some point you will be speed farming T10 in about 2-5 minutes, getting around 900m xp per run, amassing paragon levels and more gear to make that GR60 push.
I guess just keep on keeping on man, its a system, no real easy way to cheat it.