RNGesus didn't give me a single Thunder SSR, so I'm rolling with a SR Team. I can clear Water Ultimate Disaster solo, do AQ 6 and collaborate in Ragnarok Disasters with the following team:

Mordred with Blade Eliminator and EX Ambush
(Thunder Spirit) Nyarlathotep (Xmas Limited Edition - got her last year with MJ)
Ramiel
Fodla
Chou'un (Sei) (From Koihime Collaboration)

Gryla and Cyclops as subs.

Against Water Disasters, I use Black Propaganda and Fodla's orb eat to control her Overdrives. Then use the dispel effect added to Outrage by the Soul Weapon. Full Burst BEFORE she rages, to avoid her barrier.

For AQ, I guess the other SWeapon, Clarent, would fare better (adds gauge reduction to Outrage) as the boss can't be dispelled, but I don't feel like investing on the weapon.

Anyway, I noticed Ramiel's group buff became B-Frame, which for me is a buff for her. Now she won't contradict with Avalon's Guidance, Cursed Chanting Chains and, in my particular case, Nyarlathotep´s Caprice Arousal.