Advice for a water team,

I've been playing for a good while now and currently have this as my spread for my water team

Soul(Either Herc or Jeanne), Chutulhu, Ryu-Oh, Ashera, Nike(Unleashed)

Holloween Osiris, Snow Raph.

Overall it's already pretty good, but are there any other water himes now or in the future that I should aim to get or is this grid good enough, and I should move on to develop another grid?

Just need some advice in general.