The Bone Necro used to be very powerful and fun to play. We have not as yet included a sample because the new version of Diablo has somewhat nerfed this build.
Some folks love the Poison Necro. I've built a couple. But have never really created one I could say was a major player in the group. If we come across a build worth posting we'll include one here. Otherwise just google diablo poison necro so see what might be out there.
A Group Summoner is special type of summoner. The key difference between a standard necro and a group necro is the curse "Lower Resistence." In a group necro that skill is maxed.