I have an Ice/Storm up to 48 right now. The early levels were a nightmare of endurance management but has since leveled out with proper enhancement selection. Storm really shores up the anemic damage of ice and both have nice soft control options that you can deploy while you wait for your hard holds to recharge. That, and once you get the 1-2-3 punch of Jack Frost, Tornado, and Lightning Storm you create a beautiful, deadly mess on the battlefield. Just make sure you invest lavishly in KB>KD IO's if you take this route. Frostbite goes a long way to limit the KB, but there will be times when it is on recharge and you'll want your tornado/lightning storm/gale to not piss off your teammates. Just my two cents. That said, it's still a build in progress and I'm happy to take suggestions.