I'll echo that air superiority is actually pretty underrated. It has guaranteed knockdown, as well as -fly. The knockdown is immediate soft control that works on many higher ranked enemies that resist other 'hard' controls. The -Fly is situational, but useful when fighting annoying 'fly awaaay!' enemies. It's got a quick enough animation, reasonable damage for the added perks, and is a nice add-in when you want a flying character but have no use for hover.