W/N
Sword 15
Strength 13
Skills:
Grenths Balance (E)
Heal Signet
Endure Pain
Dolyaks Signet
Sever Artery
Gash
Galrath Slash
Final Thrust
The path:
Leave from Venta Cemetary into Sunward Marches. Follow the path below...

You can bring heros and henchmen to clear everything up to the boss, then simply send them back far enough that they wont get any drops from the boss. I usually waypoint the hill back by Venta Cemetary. Once they are grey on your party list, start fighting the boss.
The skill usage is pretty much the same as the old riposte build. You begin the fight with Dolyak Signet and start hitting the boss. When Sever Artery is available, I use it. At around 500 hp, Deathbringer spikes me a few times, until I am around 1 to 20 hp. Once you are that low, fire off Grenths Balance to heal and damage the boss. After Deathbringer spikes you that low, the is more than enough time to hit Grenths Balance, so dont worry about your health being that low. After Grenths Balance, use Gash, Galraths Gash, and Final Thrust. Constantly keep Dolyaks Signet up for the added armor. At some point, around 100 health, you might be able to use Grenths Balance. If that is not the case, hit Endure Pain and finish Deathbringer off with your attacks.
To tell you the truth, I have soloed this boss more times than I'd like to admit, and have not seen the scythe drop. Wiki says thats who drops it, and the name sort of makes that obvious. Hopefully someone else has more luck than I do.
This would be Deathbringer.

Hope this helps.