So, my Thunder Tower setup:

I know I'm very late, but real life and work has kept me very busy. And the little time that I had I spent on trying to farm Delphys.
Some notes, as usual:
1. This is based entirely on Cobble's translation. I haven't really bothered to cross-reference him with the DMM wiki, so if there's any mistakes, they're clearly all his fault, mmmk?
2. I noticed that Wind has some god AWFUL Hime quality outside of SSRs. I had some serious trouble trying to fill up slots for this Tower. Too bad I don't have Wind Rami.
3. On a related note to #2, be VERY wary of debuffing enemies in this Tower. This means take floors 8, 9, 13 and 14 seriously. Wind's sources of Cleanse: Soul's EX skill, Set (SSR), Wind Poseidon (Limited SSR, debuff prevention instead of Cleanse), Wind Apep (Limited R) and Behemoth (Eidolon, takes a good amount of time to be available).

Since I couldn't get 10k points for Wind Kaiser, I'm pretty sure I'll fall a bit short of completing all missions. Hopefully I'll at least get to top100 this time, sheesh.

PS. As usual, don't just copy my setup. For your own good. Make your own plans.