PD is stiffer than APD. I think you should try some more arm-friendly rackets. Prokennex and Volkl are two brands that produce generally more arm-friendly rackets. I think you should give Volkl Organix V1 midplus a try. It's also a powerful racket but very arm-friendly.
pb 10 mid, BlackCode 54lb/52lb; pb10 10 mid, ZoTwist 54lb/52lb
pb 9, SPPP 17g 54lb; 9, SPPP 17g 54lb/ TNT2 56lb