Bone necro is weak in pve, and good in pvp. I believe if you condense the synergies it would fix the pve aspect, without drastically changing pvp.
Here’s what I would do:
Remove bone wall and bone prison synergies from the offensive spells.
Bone Spirit gets 14% per point from bone spear and teeth
Bone Spear gets 14% per point from bone spirit and teeth
Teeth gets 30% per point from bone spear and bone spirit
This way they are actually a good investment for pve because there’s enough points left for other skills, and pvp isn’t really effected because people would still opt for bone armor, bone wall, and bone prison for survivability.