I ran into him today. Took my grenade, all my special ammo, all my heavy MG ammo, three direct hits from Golden Gun, and a mess of Bad Juju blasts to the head to kill him. The Light smiled on me, though. Scanning his area was the last mission I needed for the 6 patrols in the Cosmodrome bounty. I leveled Vanguard when I turned it in and got Ascendant Energy, a Mote of Light, legendary chest armor, a rare sparrow, and a Vanguard Commendation. Best level reward I've ever received. I don't know if he helped, but Randall rocks!!