Act 8 exploration hero rank up

Firaleon

Hello everyone, i completed act 8 and now i want to start exploring, starting from 8.3 and 8.4 but im not sure which champions i need to rank up and use awakening gem. İ will be glad if you can give me some advice.(Also i didnt complete grandmaster gauntlet, necropol etc… little advice for them would be great too)

Firaleon

Would be good if someone would say something...