Fixit or Spidergwen?

Dexman1349

I have some science ISO about to expire and my only two options are Fixit and Spidergwen. Which do I rank up?

Or do I use it on a champ of another class?

Dexman1349

Other unranked 4* are (all unduped):
Jane Foster
Iron Patriot
Iron Fist
Kamala Khan
King Groot