If you get real good w/ him, you'll definately win more duels w/ a bone nec. But I think you'll have more fun w/ a rabies/fury druid.
I made a hybrid druid 2 wks ago and he's a blast. Hosting everyone and going out and infecting 8 player games then picking people off w/ fury. Sure he gets owned by lots of chars, but he's respected for what he is after people duel him. I'm constantly asked how i made him and what gear/skills etc.
With that said, a well built and played bone necro can really do well vs. all in pvp. They eat rabies/fury druids for breakfast btw...well...at least mine.