IMPS and
1D is 11-15 precision.
Is it a good strategy for south to double agressively with some (8-9 pts) to protect you against a psych or weakish response. If the pts are split you are risking 3or6 imps to gain 2or5 and you probably give opener a XX to show both m with longer D (2C would show C equal or longer than D) and a give him more info on how to play the hand. Also after a tight double you cannot play forcing pass.
Im not even sure if its a good spot for east to respond light at Imps.