From experience, for me, Vampire Lord has a better sustain, an overall better buff and debuffs, no mana issues and higher burst. I find that Vampire Lord just kills much faster than BlazeBinder Sure, BB has faster cooldown rates, but VL can negate that (even if temporarily) with the 5th skill, and the general DPS is still greater with VL than BB. Also, having an auto-attack that hits 3 mobs is pretty useful when you’re low on mana... assuming that actually happens.The advised Combo (IMO) for VL I use is 3 5 4 2 1, It can melt 3 mobs with 10k plus health like butter. Its up to you who decide which is the "best" farming class. Its just a matter of preference. Though VL will always out DPS BB because of its 5th skill.
VAMPIRE LORD FOR THE WIN !!