Nah, you're pretty much done with 2 good SSR himes of the same element or with a 100% Eidolon.
Follow sanahtlig's guide to know what you should aim for.
For instance, we're getting Cybele U (Top 3 Wind powerhouse), 100% Wind Eidolon AND Titania Awakening in 2 weeks tops. So you should either be aiming for wind or follow your guts and build an element of your own liking.