Rank Roster / Rank Up advice

So I have gone through a lot of rank ups and got lots of new champions recently and I just need advice on who to rank and if I should start act 6.2, LoL, AoL, or other endgame content














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Nick 5star (6star one if duped),
Ultron, Apoc 6star.
These are absolutely r5 worthy. Rake them up as u get resources.
Other great options are quake, sorcerer, molegod and cgr.