Thanks for the post, he finally dropped one for me after 15 tries or so -- not kidding. I had to go do some missions elsewhere cause he started to drop nothing or stolen provisions only.
Anyway, I did my attributes a little different and can succesfully kill him 95%+ of the time. Sometimes that front group doesn't release aggro which can make it hairy if you get interrupted at the wrong time.
Using the ignorance variation someone posted above -- PS, HB, SoJ, Ignorance, EB, Men, BA, BS.
Dom -- 7
HP -- 9
SP -- 15
PP -- 12
DF -- 9
With 7 in Dom Ignorance lasts 14 sec. At 15 energy cost I wanted to limit how often I had to cast. 9 in HP gives you the full 10 pips with Men+HB, which worked fine for me as the only degen is from the front mob group and they release by the time you get to the boss. Two rounds of SoJ does the trick unless he gets lucky and interrupts Ignorance. Just noticed that the OP puts 3 in axe for the ffs. Will have to try that.
Edit -- if you go with ignorance no axe mastery, so I won't be able to try that.
Anyway, since it took so long for him to drop one for me I got to tweak numerous times -- maybe it'll help someone else. Thanks again to those above for the idea/guide.
2nd Edit -- Went one more time before bed and he dropped it again, 2 times in a row. lol