Since the upcoming event is water tower, I've decided to fiddle around with my thunder team. The thunder team I originally planned on running was:
Baal(Unleashed), Jupiter, Justia(thanks to the new gacha today), Ramiel, with Andromeda running Sniper Shot.

At first I wanted a full thunder, with Andromeda running Sniper Shot as I lacked ATK/DEF down. But with how often I was missing one of debuffs I decided to not go "full thunder" by instead replacing Andromeda with Mordred and throw in an off-elemental healer.

This is the team I ended up planning on using instead:
Baal(Unleashed), Jupiter, Justitia, Nike(Unleashed), with Mordred+Sniper Shot. Subs are Kingu and Nemesis.

The only SR alternatives I have are Hermod, Krishna, and Astraea due to my limited thunder pool.

I'm also running Thunderbird(LB1) as my eidolon but am wondering if I should swap to Huanglong(LB0) instead for the bonus HP, which I severely lack due to a weak weapon grid.
Considering that I have neglected leveling my thunder weapon grid for my fire/water grids, although nearly full assault, my average assault skill levels is around 6. Would the change from Thunder ATK up to Thunder character's ATK up have too big an impact?
Should I also throw in 1 to 2 defender water weapons so my Nike has more HP?

With the current setup, my thunder team is at 31K hp+attack combined.
My water team is Asherah, Ryu-Oh, Cthulhu, Nike at 38K hp+attack combined, but sadly with only 5 assault 3 defender and 2 off-element weapons(with 2k+ attack each).
Will the thunder team I plan on running and of course leveling assault levels in the next few days, be worth using? Or would I get better results just sticking to my water team?