Has 3 PH (from my experience) Well I killed all 3. However I do think it might only have 1 PH right next to citipati's spawn. The 2 times i've popped it, the PH didnt spawn from that crack (meaning NM is up). However the NM can spawn from 2 different cracks. 1 Crack next to the bushes west of citipati, and one across a gas barrior that goes down occasionally. Pics are from the first known kill of Ambusher, posted by someone awhile ago.
http://img520.imageshack.us/img520/8...nlocmapau7.jpg
http://img72.imageshack.us/img72/5514/standherelp0.jpg
These is past the gas that occasionally goes down