Hey buddy, ok yes, you can inject test cyp and mast at the same time. You can mix them into the same syringe.This is a low cycle. You could probably get through it without getting side effects like gyno but since you are dieting, you do want to make sure your estrogen is at the lower end of normal to ensure you can make optimal fat loss progress. Can’t say off hand exactly how much will be optimal but somewhere around .5mg arimidex  2x wk would be good. Don't forget to pick up your PCT meds in your order. You can get solid pharm quality PCT stuff from Naps. Clomid pst cycle is what I would use. If you want to ramp up the fat loss, you can consider a fat burner, like clen