Wait...so does anyone know whether those 3 abilities stack the sight range or not?
Letting people know about omniscience...either a broadcast message or an 'eye' buff icon on every unit?
Advanced Warning only affects infantry, and Scopes only affects Volks/Grens. AW, Scopes, and Omni stacks, but it's nothing to worry about; Volks/Grens with all three have 59 sight, while Bikes with just Omni have 77.
And any competent Def player with Omni is going to have a bike on the field at all times, which makes AW/Scopes largely irrelevant.