Thread: Best storyline farming areas

Right I'm still planning on using the event eidolons to lead. I just want Yinglong and Sephirot to fill out the Eidolon grid. Its especially helpful because Yinglong reduces all enemy attack and Sephirot boosts everyone's defense, so I don't feel like limit breaking them is wasted, especially cause it will only take 2-3 days of farming materials in each area. Just wanted some advice on which missions to farm. I've been running 15-3 for Yinglong materials and its been going well but I'm not sure its the most efficient map to run, and I haven't done much for Sephirot.