They grey is truely a pain to get. Make sure you bring a friend and have a healer merc as well. The grey is a vaccum so you need some form of EB (like the elaborate cap) Using your map go around and spring some traps. I got the ore right near the SD zone line-- the trap just north of the SD line normall has 3 boulderings. The trap just to the south of that sometimes springs a stone beast and I got 2 of the ore there. I think it takes a while for the traps to reset. Every once in a while you get mega adds/ I think 1 time we cleaned up aobut 15 skellies,5 or 6 worms a few snakes amd several golems. It took over 30 min to kill them all-- kill one and ot seemed like you had 2 more. That is why you need a healer merc.
Padding is easy normally you can get them right by line-- i had to go in and 2 the right a little bit to finally get mine-- and void gems were in ME just before the UP line
finall fight was draining-- went down to 8 manna on it. Near the outpost you can look aorund and you will finally see 2 light brown tents. You probably will see they guys warder first but he is inside the tent to the warders left. After i willed the guy I just grabed the stuff and zoned into Echo-- did not want to spend the effort working on the warder.
Good luck