The rest of the build is mostly just to optimize the amount that you can use Bone SpearTeeth and making sure you survive well, with a fair bit of boss killers, such as Command SkeletonsFrenzy and Corpse LanceBrittle Touch.
It's more of a medium range build, with plenty of variance as it only relies on a small combo. This is a very easy build to execute and yields extraordinarily high results. The Spike itself has fairly terrible stats, but it's unique ability and enough intelligence make up for this aspect.
The first being Maltorius' Petrified Spike, a legendary item that boosts your bone spear by 700%, and Bone SpearTeeth, a skill that sprays half the map in death and shoddy dentistry.
This build is fairly interesting, and relies on two commonly overlooked aspects of the Necromancer's kit.