Killing him is almost as hard as the shai-gen leader. The obvious way is to balance on a pipe until you go through three parts of an oil rig but death is very, very proabable. If you are not like that then swin around to the last part and there is a window to get through but there is also lots of guards. If you kill all the guards then you can hop to the top and then face the leader, we reccomend the second one.