I found a more reliable setup for the suicide through the Comstock Gate; instead of using the volley gun to get your health down to a sliver, just get yourself within 2 rockets of killing yourself. Break your shield with the rocket, and then wait for a second or 2 before you start running...by the time you make it to the gate your shield will have recharged enough that the rocket will kill you every time. This setup makes it nearly impossible to kill yourself on the stairs and consistently allows you to get through the gate without failing the suicide. A pretty obvious setup and very similar to the HoH skip in it's execution...
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