in game loc where i found him was 321, 196, 5.
max hit was 331 (lvl 70 rangah 2.3kAC max defensive AA for lvl and 7% worn shielding)
the room he was in there are 7 or so other mobs close by and some can c invis.
make sure you (and/or your grp) can handle at least 5 of the trash mobs when you go after him. :)