Noelle is a great healer at c1 and a sick dps at c6.
Sucrose is ok, i prefer venti, shes good at some c rank idk.
Klee is nuts even at c0, some people hate/love her, she hits like a truck.
Id level klee, barbara (you should have her for free) xiangling (you get her for clearing abyss 3-3) and mc/sucrose for anemo.
When you get into abyss 6+ (two teams) you'd have 2 dps and 2 supports.