Are you 100% sure you used a Bone Wand? In my experience, and i've done it about 5 times, Bone Wands will always get 2 sockets from Larzek. I have a few friends who have made bonemancers and shoped Drogan for Bone Wands and have always gotten 2 sockets from Larzek as well. If you mess up and try it with a 'Wand' or 'Yew Wand', Larzek will only give you 1 socket. Usualy Drogan has 2-3 'Wands', 8-12 'Yew Wands', and 3-4 'Bone Wands' in his stock... you should ignore the first two types (wich is unfortunately the vast majority of his inventory) and just look at the row of Bone Wands as those are the only ones usable for white.
Anyhow, If your are a moderately high level, the Wands sold by Drogan have 1 to 3 random skills with a lv requirement of 24 or less. This means Drogans wands will never have Bonuses to Bone Spirit, Poison Nova, Lower Resist, Fire Golem, or Revive unfortunately.... any other Necro skill can be found on them however. Each skill will have a random bonus of 1-3... so it is possible to find a wand with +3 to three skills from Drogan, but its very very very unlikely, and even more unlikely for those 3 skills to be useful.
As for Teeth, if you are making a pure non-cheese Necro, its probably not worth it. If on the otherhand you are making use of the Morrowalk Bug, you can afford to max teeth and all its other synergies, making it a very potent spell that can clear many areas far faster then spear can by virtue of its wider area of destruction. If they ever fix the Morrowalk bug, Teeth will probably be a much less useful spell, Spear is good enough to operate without it, I dont think the same of teeth, wich gets a much larger synergy bonus from the bug.
Also, if you dont like Bone Necros because of the walls, you should look into investing a bit into clay golem. With a halfway decent clay golem, you rarely ever need to use your wall/prison spells, I almost never do. Another option is the Skelebone Hybrid. Skeletons dont need 20pts into Undead Mastery if you just need them to be tanks... if you max the Raise Skeleton skill but leave the mastery at 1pt, your skeletons will have very near the toughness of a zoomancers minions, they just wont do any damage (but thats your job with the bone spells anyhow, you just want them to run interference). The White runeword works great with the SkeleBone Hybrid - esp if you shop for a wand with bonuses to raise skeleton in addition to bone spear - and the Morrowalk saves a ton of skillpts to invest in the raise skeleton skill while simultaneously givng your minions a 2pt boost to their neglected mastery.
Seriously: I think all characters can be useful in a party if played right.