Got a couple new SSRs and was hoping for some team advice.

Water:
Cthulhu, Sarasvati, Ea, Asherah, Aphrodite, Shiva, Ryu-oh. Was previously running Aphrodite/Sarasvati (depending on if I needed a cleanse or not), Shiva, Asherah, and Ryu-Oh, but with obtaining Cthulhu was thinking of swapping her with aphro/sarasvati, however that would mean no healing for raid fights (for soloing). While my water grid is definitely my best, it's still not quite there, and I still haven't actually bought a main soul weapon yet - largely due storm bow alvand being necessary to get to -50% def down (which after acquiring Cthulhu this morning, I believe no longer will be necessary, however it would still be so if I want to use Shingen's EX ability.....).

Wind
Cu Chulainn, Azazel, Hastur, Gaia, Titania.
I just got Titania, who I'm assuming should replace Azazel and be put in the first slot (or should Cu still be first? Haven't messed around with her yet and still unawakened). The main question is should this comp be running Shingen with EX ability or no? No SS means only 40% def down, which makes me think for now Herc is still the way to go, but that means losing out on Shingen's EX for the smexy burst chaining.

Dark
Thanatos, Satan, Pluto, Hades, Amon-U, and Susanoo.
Just picked up Susano-o and still leveling her, but was curious if she could even be shoved into my line up in any way. Using Thanatos, Satan, Pluto, and Hades atm with Shingen (EX ability), which unfortunately only puts me at -45% def down, but feel like that's better than going Amon + Satan and leaving Thanatos out. Either way, adding Susano-o would mean replacing either Pluto or Hades, both of whom seem pretty necessary considering I have no atk down in my comp with Hades (and my dark grid is severely HP lacking/underwhelming as a whole). I've debated taking Thanatos out and running SS on soul, but not sure if that's worth it especially as I'm still leveling Susano-o.

Fire
So my fire comp is garbage, only have Prometheus and Dakki and using Haphaestus cause fire has no def downs, but can never decide who I want the last SR to be. Currently running D'art with soul weapon, but realized that to clear the rank 5 accessory quest I need to run Shingen for PF (or else I can't drain her rage gauge quick enough), making me think Shingen's the way to go overall, but that means only -35% def down at most running Haphaestus. Keep going back and forth on Themis (for quicker bursts), Kagutsuchi for the explosive ability nuke, and Agni for her fire atk up. Also toyed with Ragaraja, but always seemed a bit too lackluster for me. I could of course opt out of running a 5th fire unit in replace of more debuffs from another element, but not sure who I would use.

Sorry long post. Any help appreciated.