Are your top choices based on actually seeing availability or just checking the necessary mileage. The point is that there may not be seats available. Given that you (1) need these for August, and (2) indicate that LH (not LUF) is available to MUC (not MUN), suggests to me that you have not checked actually available inventory. LH does not release F seats to non LH-top elites until 14 days prior to flight.