I agree with essence, its a good way to balance it, and it gives reason to play multiple ones.
But if this happens essence, there needs to be a way to ditch your current flood before it sucks all your mana.
Why? Dissipation shield has no 'built-in' way to ditch it, yet it is useful enough to be used. If you really feel you need to ditch it, use deflag/pulvy/butterfly.
And I've been thinking about antimatter+flood+permafrost deck, so I guess butterfly would be the best addition (
), yet so far my attempts at building such a deck have very low damage potential, and also don't have any serious reason to ditch flood (you need a few water pillars anyway, so no problem to regain water after flood drains all).
Also
+
seems pretty good, though I like adding a few ulitharids then, to counter momentum, anubis etc, probably cheaper in water quantum than squids.