What bug? Since I'm gonna start again...
Übereil
There's a bug with the elete boots 'marrowalk' which allowed the necromancer to get a free 33 point synergy to bone spear, bone spirit, teeth etc. Any item with 'charges' of a spell on it (in this case lvl 33 bone prison) will act as if the points have actually been put into that skill as far as the synergies are concerned. In this case 33 points!
As you can imagine the bonus damage is very good. (about a 2000pt increase in bone spear damage. <img src="/ubbthreads/images/graemlins/biggrin.gif" alt="" /> )
Marrowalks are very difficult to obtain though... <img src="/ubbthreads/images/graemlins/biggrin.gif" alt="" />