Nick Fury. Even unduped. Do it.
Personally I wouldn't rank champs with the goal of creating a 'starting team'.I'm very stingy with my resources, and I only ever R4/R5 champs if they will help me reach a certain progression goal I've set myself. It helps to narrow down my options, and also leaves me with a good constant surplus of resources so that I can quickly max out a specific champ when the need arises. Currently sitting on a total of 19x T2A, 8x T5B, 2x 4-5 gems and around 10 or so 3-4 gems. If I were you, I'd consider:1) what are the key utility gaps in your roster?2) what content are you planning on tackling next?3) which champ will help you complete above content with fewest resources spent?4) do you really need to rank up a champ right now?