Joe tried SC1 front and rear but they tore appart after a very short time on his R1 at Pasir Gudang. The track is pretty abrasive and hard on tyres and the temp is too high. Even SC2 have a hard time at Sepang which is kinder to tyres. A race weekend with 30 mins practice, 30 mins qualifying and two 15 lap races will see a set of SC2's off half way through the second race. For those on a one tyre budget SC2 front and SC3 rear might be the ideal compromise. In a cold climate SC1 might work as a pair or like you say SC1 front and SC2 rear.