Interesting take on things and Im not convinced its necessarily true depending on the exact build and gear set ups, but I personally don't feel that one really owns the other when both are in ideal condition.

Anyways, ScamAlot has essentially made a couple changes in Drac's build, substituting poison for bone, mages for bone wall, and deciding to put dex points into more vitality instead. I personally prefer max block just because if I ever teleport onto someone or if for some strange reason someone gets to me I don't want them getting lucky by hitting me once or twice and then I die (along with all my precious hard won minions!) and I'm not convinced the extra 200 life or so is going to make that much of a difference if someone actually is hitting me so I prefer to lessen chances of actually getting hit. Maybe I just suck at using minions but I've always found block to be a good thing and a staple in most guides for a reason unless its supplanted by skills such as the amazon uses (dodge/evade/etc).

As far as poison vs bone goes....that debate goes back to a poisonnova vs a bone necro except its only your secondary skill now instead of a primary. While you should have enough points and +skills to make poison decent, if you don't mind using a bug (which you dont if you use poison anyways), if you use marrowalks I think you consider the advantage of the 33 synergy to bone armor and spirit. With the setups Scam and Drac suggest both use essentially 96-97 skill points (level 85 or so with quests I believe) but while posion nova is certainly easier to hit with, if you decide to pump mages instead of a poison synergy, your damage won't be all that great once you factor in the other guy's resistances even with the poison not being reduced in pvp (and the fact some just think poison is cheesy). If you don't pump mages and/or you don't use marrowwalks you have more of a case for poison I think, though the bone prison/wall does synergize with your ever useful bone armor as well if you choose those routes..

Essentially in my opinion you'll need to decide if you want to max skeletal mages (or revives) or place the points in your offensive casting synergy. If you decide the latter then I think you'll want to make a decision regarding poison nova or bone spirit.