OK, based in Europe Flying on BA is my main source of SCs!
Just a few hints: Get Flights on BA that are over 600 Miles! So NOT LHR to MUC/BER/HAM!
Things that work are: MAD, BCN, NCE, VIE, CPH or OSL, LIS, ATH
Start your MR not from the UK to avoid the luxury tax!
Cheap Business-Class Fares...