Just checking, because I decided to solo normal mode so I can get all the Badass challenges done, and I saw I still have a few missions in the HUNT.
Well I remembered from playing the game, that the shrines should unlock something near the beginning with the switch.
Well after trying a few times I figured out how to do it, and was able to flip the switch. Lo-and behold, Dex the Invincible popped up after killing about 30 tribers.
I found him to be very easy to beat, Tactically, and I can't see it being any worse than fighting Verm or Terra... and He dropped at least twice the stuff that Pete or Terra drop, and I found more than one Orange dropped... Of course it was all level 30 junk, so I left it, but 3 in one drop seems better than any of the other Raids.
My guess is that they bumped the drop rate up on him, and lowered some others. since in order to do a Raid Run, you have to run to all the boxes. technically making it a team effort.
He had 13 billion health at level 50, I'm actually kind of surprised he only went up to 133 billion. That said, it doesn't actually take that much damage to kill him, it just forces you to hit his critical spots. Regular drifters actually have tons of health as well.