Progress check, cause why not.

This is my list of notable (maybe?) stuff so far:

Soul: Mordred (Water, Dark, missed the St. Nicholas sword lmao) , D'Art (Water, Light)
Water: Snow Raphy, Ea, SSR Nike, Triton, Oceanus, Kikuri
Light: Sol, Raphy, Belebog
Thunder: Raiko, Hermod, Nemesis
Wind: Gaia, Hermes
Dark: Eligos, Pharol
Gacha SSR Eidos: 1LB Ouroboros, Echidna, Grimekahla

So the things I deduce going forward will be 1. Main water, secondary light, 2. aim for Cthulhu/ Ryu-Oh (which priority?), and 3. grab dat 100% water eido in april, and maybe try for Ashirat.

What legend soul should I be aiming for, and what are some other tips for my account? Also, is it advisable to run dark main weapon on Mordred to offset a thunder element disadvantage with my current weapon and hime set up?