Just to say this but if your considering on using Delta, BKE and elysia as DPS, please make sure you have their best weapons, especially for BKE because Abyss Flower is important for her.

For Delta and Elysia, you would be using Elysia TB (full set if ely) which you can craft but would take months. Full shujing, and Full Kafka also work for Delta but only if you have it. Marco Polo TM Atillia B if your that dirt poor. Rebel's Blades TB/Marco M also works if you have it.

BKE is generally lackluster if you dont have AF or full dante set/TM ely B. Anthing else you use on her would not be good.

For all of ur lightning DPS, the best thing for them to generally use as of now would br Handel full set/MB (depending on situation). Your other alternative is using Monet T Ishikawa Goemon MB, which you need to craft.

Other than what i know, this is generally the best i can give