Catching up

Hello guys,

I played as prot warrior until 9.0.5 , now I want to return to wow, I would like to play warlock for pvp and raiding, also holy priest for pvp and M+. They are both lv 60 with very leveling gear.

I remember doing torghast and getting renown a real pain, so I want to catch up with my warlock, is this ok? Or should I do it with my priest? Do I need to get renown and complete the story line with both of them?

Thank you xD