yeah, winter blast is the hydro spell of choice because its aoe is sizable, its damage scales well and it is one of few spells that does not do friendly fire
it's not uncommon in the later portion of the game to use rain on one or two clumped enemies, then use winter blast and have all of their armor disappear along with them freezing because of how good it is. even better if it crits
One combo I really want to try is Rain + Global Cooling + Ice Breaker. Total cost: 3 AP. The only problem is that the cooldown on Rain is a ridiculous 6 turns while the cooldowns on the other two are 3 turns. I guess I could always give Rain to more characters through, so I can have a second one on demand. And there's scrolls, too. All I need is water essence and herring.
