First, the build!
Protective spirit
Healing breeze
Spoil Victor
Vampiric bite/touch
Watchful spirit
essence bond
balthazar's Spirit
Mending
16 Blood
9 healing
9 Protection
Equipment:
Standard 55 fare (Superior runes on each piece of armor), with a +1 blood headpiece, and the -50 offhand. I'd recommend using a Rajazan's Fervor, in the video I'm using a Firey FlameSpitter of Enchanting because I was too lazy to get one my Rajazan's from a different character.
Map:
Start from Nundu Bay, and head out the north Gate into Marga Coast Put on Mending and Watchful spirit, and start running north. When your energy is high enough, put on essence bond and Balthazar's spirit, after casting those you should have at least 20 energy leftover.
Near the portal for Dajkah Inlet, You should see the boss "Chor The Bladed" Watch out that you don't aggro any of the patrols, put on prot spirit, and aggro his group. Before they start attacking, put on healing breeze. Once you have enough energy put Spoil Victor on Chor and keep it on him. Make sure to attack him, if you're not attacking, bosses have a bad habbit of running from spoil Victor. If he stops taking damage from it, just hit him with Vampiric bite. Collect your loot, and either die, or head south towards the entrance again.
Once you get down there, head east, and down the hill. Wander east until you see Bubahl Icehands. Aggro him, and walk back a few steps, be careful because theres a good chance that some bugs will come up from the ground, and they might prove too much along with the rest of the group. Follow the same steps as before, making sure to keep attacking, so he doesn't run like a scared little girl. When he's dead, you can either kill the rest of the enemies, or start running east again, not along the beach.
Make sure not to aggro anything, and if you still have disease on you, you can pass close to the herder and degen him

Theres at least two more bosses in this zone, an assassin, and an elementalist... the Assassin has two monks, and in my experience, theres too much healing to be worth it, the Elementalist is just south of the Dervish, and comes with an irritating amount of Degen, I tried him once and died, haven't bothered trying again.
In the video, I only have 15 Blood magic, because I'm too lazy to pick up a blood head piece

The list of farmable bosses:
(Thanks to: Butters1110, Neema, The Kraker)
Jishol Darksong http://gw.gamewikis.org/wiki/Jishol_Darksong
Mahto Sharptooth http://gw.gamewikis.org/wiki/Mahto_Sharptooth
Bolten Largebelly http://gw.gamewikis.org/wiki/Bolten_Largebelly
Riktund the Vicious http://gw.gamewikis.org/wiki/Riktund_the_Vicious
Robah Hardback http://gw.gamewikis.org/wiki/Robah%27s_Axe
Tenezel The Quick http://gw.gamewikis.org/wiki/Tenezel_the_Quick
Hanchor Trueblade http://gw.gamewikis.org/wiki/Hanchor_Trueblade