Love /Storm also... to be honest though Earth/Storm has a little more synergy... I solo +4 x8 player stuff with mine all the time
I dont use tornado mostly because it tends to wander off and cause aggro a bit to often , scattering said aggro in the process...
The key to a good stormie is that they DONT knock crap everywhere just for the sake of it , being a good stormie is knowing when*not* to use a power and the key to effectivness as a solo /storm is having an immobilise that is strong enough to counter the knockbacks.
That said /storm is amazing for AV takedowns , slot hurricane with -recharge procs and +100% recharg proc and use snowstorm and freezing rain... with good enhancement slotting you can be running 3 Thunder Storms at once which is enough to "tip" most AV's hitpoints solo , hurricane doesnt knockback AV's so its perfect in this scenario.. the other 7 players just make it even more brutal.
But yeah , if you think ice is good with storm, try earth, you wont look back.
Be warned however , its more of a "F1 car that will kill you if you dont know how to drive" type of build.. so not for beginers