Oooh.. SIVA subclass would be kind of awesome, at least in theory. I'd definitely love a chance to be a Technomancer Warlock. What would the Supers and abilities look like, though? Upon a good night's rest and some more thought, Arc kind of covers most of what we generally tack on to Wind-based characters, so I'm not sure what one could do to set it apart from those subclasses without butting up against the Arc abilities. Ice, however could offer a lot of new and unique abilities that wouldn't step into the territory of any of the other elements.