u/ActivitySerious48

My team consists of anaxa e0s1, cerydra e0s0, sunday e0s0, dhpt e0s1 and I would like to verticaly invest in anaxa. Im wondering if I should get cyrene to replace sunday (although a sunday buff is rumoured so in the long term he might be better) what eidolons I should start collecting and if I should get cerydra s1. I also have around 200 pulls currently if that helps.