i ended up changing the RT ZRH to outbound MIA-ZRH purchasing two one ways. Forgot about the ability to get one way tix for rewards. We are usually RT through the same airport
we decided to leave from LHR so i transferred Amex points to Virgin for two Upper Class back to MIA. The interesting thing was that the redemption for UC through Virgin was 47k each, while on Delta the exact same ticket was 86k