Why are we comparing to Dazzling Ray? Chromatic Orb does 3d10 + a rider effect, looks like a winner in the single target take down area to me.
But yeah, Howling Tempest. So good!
Another good trick with that is the fact that as a storm sorcerer, you have resist thunder 5, so you can almost certainly stay save in the zone even if you're not in the center.
Well no you can't, since having 5 thunder resist means you ignore 5 thunder resist as a storm sorcerer...