Necro - Levels 8-12

[Nubben]

I recently started an (untwinked) Iksar Necro and I'm up to level 8 now. I think I'm starting to get a decent feel for the class (I mostly play melee characters) but with the new level 8 pet it's becoming much harder to out damage my pet and gain full exp.

Am I better off fighting blues for exp, or should I be tackling whites and yellows? Do I just let my pet eat the exp or should I always be trying to out damage the pet? I do have the Ward Undead spell, so should I try to focus on undead mobs?

So far I've been hanging in the pit in the Field of Bone, but I'm open to try other nearby areas. Any advice is appreciated.