Stormneto's still a viable combo, right? Lately I've been having trouble placing well in PVPs, but I keep seeing C.Storm / Magneto pairings in my bracket, seemingly doing pretty well. Not great on defense (easy pickings for just about every team I've fielded; guessing the AI can't pull off the Polarity Shift / Wind Storm combo), but if you can storm up the rankings (no pun intended) quick enough then shield, that's all you need... right?
In those cases I match green in hopes a board clear AP boost will net the purple/blue I need to start the Storm Train runnin'.
I have a pretty diverse roster of 166s, and I still use MNM + C.Storm on low level PvE nodes because they are fast and fun to play.