Team Composition

With those four, I think making Columbina the attacker would be good, but maybe characters with proper attacker roles like Flynn would be better. As for attackers, Klee, Sucrose (Fischl) are strong with just basic setups. By the way, I'm playing around with a Hydro reaction team consisting of Tartaglia, Klee, and Zhongli. It's fun.

Moon crystals are also fine, so a Geo attacker is also possible. With Columbina and Mr. Zhongli, you can get a good Moon reaction, so if you have a Geo attacker, it might be good to go with an Ine-Colo-Sucrose on your Geo attacker. Otherwise, a Hydro or Electro attacker seems appropriate. If you can pull Freminet, I think Freminet is the strongest, but I don't have Freminet... However, when I played with a friend, they dealt crazy damage, so Freminet is definitely strong. I think putting a Hydro or Dendro attacker with Ine-Corona-Hi isn't bad. I used to run that party with Alhaitham a while back ☺

I'm running low on Geo characters too, so I'll try pulling for Frins... I think I'll play around with Ine-Corona-hi for now~! Thanks a lot for all the answers!