Go go go go rank her up! Then r5 her. Absolute beast.
Unless you’re opening multiple 5* or Cavalier crystals a month. Or can clear with your current roster, then your better off strengthening your team now and progressing in the game. I’d say use it on Gwenpool. A bird in the hand is worth 2 in the bush. You could be waiting years to pull an Aegon, NF etc. Ranking up now, may help clear content and gain more 5* shards and other resources for more rank ups in future. Including dupes I’ve opened around 78x 5* crystals, have 54 champs and no Aegon, Blade or NF. Having said all of this I have a skill 4-5 and and awakening gem I’m saving for Aegon/Blade/NF myself, but the way I see it is I’m cavelier, clear the monthly uncollected EQ’s without using resources so using them on any other skill champ would be a bit of a waste for me. So depends what position your in.
Agree with Wozzy. Unless you are a true an end game player, she will definitely help you move forward. That is more important than waiting for something better.