khull: Does anyone know of a tool to check the class bookings easily?
What exactly do you mean?
You get told the number of SP and booking class while making a booking (or dummy booking).
Milage runs are a cost cause for low cost fares unless you want to spend all day flying between Wellington and Auckland all day on $90 fares. If you really want a single milage run you're better of focusing on flights which are high earn and paying better pricing, ie 67 SP for $483