Right now water Myth units do not see much play for being water only, the only water Myth units I see being useful is the Man O’War and Sea Serpents for being the only myth water units that can attack in range and control a larger space outside of water. This mean that if your opponent(s) does not commit to water, Most water myth units are sad and ignored, and are easily kitable with some a range land units.
Suggestion
- Make them the Crab and Turtle hybrid able to walk on land like the titan (RARRR!!). They are mythical age units so it shouldn’t disturb water play until later stages of the game. The Man O’War should be fine with its big LAXOR.