ALWAYS hold his d3. His psycho rush will always be coming afterwards, as it's totally safe *broken* (except against reptile's slide). Also, if your character has a good njp, try to space yourself so that you can njp his advancing specials (I forget the names) on reaction. Works particularly well for whiff punishing the low lunging stab. That's all I can think of off the top of my head at the moment.