I'm thinking Jack-o-Frost should be low priority/skip because of the 45% water eidolon coming soon. Or, since I'm not a whale and my teams are unfocussed (i.e. I tend to use elemental advantage in every fight, and even Lilim teams), is the fire resistance valuable enough to either spend elixirs to get her, or even to prioritize her over the weapon?

Recently pulled Cthulu from gacha so I'm thinking I might be getting somewhere with water if I can roll Snow Raphael.