Andromeda skill-ups should be in the next survey dungeon. Hermes I believe will be skilled up by Super Sapphire Kings in an update soon(tm). You just missed Hatsume skill-ups in Light Seeker but that will probably be put into the coin rotation eventually. So with a little patience you should be able to skill-up everyone with reasonable effort. I've seen Andromeda used to beat a lot of the level 7-9 Challenges and she can beat most of the rushes too, so she is pretty strong. Having said that, the new LKali Uvo is probably going to make her your best bet to focus on for descends, but skilling up your Andromeda team when the chance comes would be high priority to me. For Ronia, I like having a turn 1 orb changer available such as Minerva (so good for fire team), Haku, or Persephone (if I'm paired with Beezlebub friend) so I would replace one of your enhancers with something like that if you can.