Your "Rankable" 5 Stars.
I have 58 5stars yet only 6 are at r4+ (r4 and up), precisely 2 r5s and 4 r4s. I go through my roster and see about 2 to 3 I can take up to the r4+ ranks but doesn't make sense cos either they won't add anything different to the table (ex why rank up Starlord if you have Spidey/Aegon at r4+) or they have rework issues pending (Cull, Diablo, Annihilus). This is important cos content right now namely Act6 and Variant requires specific champions that match it in terms of Utility and Damage. Also rank up materials, resources are scarce, need to use them wisely.
Note: I'm not a "whaler", however I spend on this game more than I do on TV subscriptions per month. If Netflix considers my monthly donations as something, then it's something..lol.
Lemme know your situation:
How many 5stars you've got and how many are worthy or at r4+ ranks?
Why dont you have more champs at r4+ ranks?