I did a test tonight, I did 20 runs with my 50 BH and on the final kill, all 20 times, Cademimu Ranger's Greaves, Cademimu Trusty Holdout. I then did 10 runs with my SI and I got the Foeseeker's Body Armor and I forget the second drop. I took my BH in there cause I like the looks for the Foeseekers's Body Armor, but after 20 runs with the excact same drops from every named kill I would say its not very random. I did get two variations on drops on the first kill. One time I got the earpiece and the other time sharpshooter pants. But I find it odd out of 20 runs the drops did not vary.