Spells: Necromancer Lifetap and LifeDoT Line

[solrokk]

I played a Necromancer on live, religiously, since Kunark.

I have never had a blue mob, or even a green mob resist any of the lifetap line at all. Let alone, it happens on average once every 2 hours. Possibly more.

I feel that the lifetap line is broken on p99, with a spell having a -200 MR check, why is this resisted so often?

If this could be looked into one way or another that would be great.