u/hornaclese

I want Columbina, since she's really my only (built) hydro applicator, but I also want lauma, cuz I heard she's good in his teams. But I also heard that if I should use lauma, I should keep the team at nascent gleam. So who do you think I should use with him?

On a separate note, how do I play him? I know his skill makes dendro cores explode, and his ulti gives him infusion, that's all I know basically.