I typically use Nonomi with Cherino, Tomoe and Tsubaki as my yellow team with NY Fuuka and either HS Nodoka or Ako depending on how much healing I'll need. I'm probably stacking too many high cost ex skills even with NY Fuuka and Tomoe is mostly there so Nonomi's ex will reach the enemies in the back and to add to Cherino's sub skill but I'm finding myself struggling to clear yellow maps in under 120 seconds. Should I swap anyone out and start investing in someone else? Hifumi and Yuzu are 4 stars, there's a Miyu that I just cut that's not pictured.