Granted my Necro is mesmer secondary, with points in blood/death/insperation.
But two things I've noticed about necro's:
1) with the various sacrifice abilities, you need some way of healing, even if you have a monk to do it for you, it's still a good idea to have a way to offset it yourself. I recommend blood. And even if you don't have any sac abilities, if you gain the enemies ire having (blood or healing) may save your neck.
2) Death (pets) are very energy steep, I offset this with the energy tap/soul reaping. I also run price of failure and spirit of failure for additional energy.
Granted, as monk secondary, you could keep your pets alive with heal area, but I like expecting my pets to die, and nova'ing em
