Hellbound monsters are lvl 99 and you are 107 (mobs should be light blue). That means you get significant exp sp and drop reduction. For better results try a place where mobs are at least light green (lvl 102, enchanted valley). Although I assume 107 player should know this.
Othell with the items you mentioned should be able to farm EV without trouble, so since problems are not due to equipment I can only guess, that it could be:
a)You don't know how to use the new macro after Fafurion update;
b)You haven't lvled some very important masteries at all (superior dagger or dual dagger, depending what you use, superior critical mastery...);
c)You are not in a clan and don't receive clan advent buff (although with your equipment this shouldn't be an issue, but might help);
d)Something else;