Hey, i was working on this build in game recently and it works out to be half decent, can put 5 conditions on target in a few seconds for a huge spike of health degen.
Attributes:
Scythe Master @ 12 (10+2)
Earth Prayers @ 12 (10+2)
Death Magic @ 11
Skills:
1)Aura of Thorns
2)Virulence
3)Twin Moon Sweep
4)Reap Impurities
5)Victorious Sweep
6)Consume Corpse
7)Signet of Pious Light

Vital Boon
The template code is:
OgSkUspqasqz1dN8cduQXwg+V8C
If you dont know how to use it, save it in a .txt file, naming it whatever you want, and put it in your templates folder for GW. Mine is Documents>Guild Wars>Templates>Skills.
Alternatively, put it into the the template code when you click the little floppy disk icon in your skills panel.
The way this build works is very simple, its more or less one chain of attacks.
First, choose a target and begin attacking them. Cast Aura of thorns, then remove it right away with Twin Moon Sweep. Then cast Virulence roght away. Now the enemy has 5 conditions, Crippled, Bleeding, Poisoned, Diseased, and Weakness. Then you can spam Reap Impurities and Victorious Sweep, and your health should stay relatively high unless you get gangbanged.
Consume Corpse, Signet of Pious Light, and Vital boon are there as back up healing, in case you come under too much pressure.
Let me know what you guys think, I'd be happy for any input
Also, I made this for PvP, I haven't really tested much in PvE, but it should be good at taking down tougher bosses.