Which skin should I get?

Alright so I have some RP and been debating on which skin I want. Currently it's between 3 skins (possibly 4) that I would like to own. I already own PROJECT: Fiora and Lucian as well as a chroma for Lucian's base skin. The skins I'm looking at currently are:

Pool Party Fiora

Heartseeker Lucian (When it comes out ofc)

Arcade Miss Fortune

Maybe Pool Party Miss Fortune

I enjoy playing all 3 of the champions I just don't know which one I should buy a skin for as I tend to change between what champion I want to "main" or just spam play. So I came here to ease the decision.