Spells: Lifetap Resists Revisited

[Frieza_Prexus]

So I know we've gone back and forth on this a lot, but I just stumbled across this patch note:

January 9, 2001 3:00 am

"Harmtouch" is now resisted as if it were a "Lifetap" spell, meaning
that it is all-or-nothing, and nearly unresistable with exception to
encounters that are immune to magic or out of the acceptable level
range. In addition, maximum damage for Harmtouch has been increased
starting at 40th level.

It seems pretty conclusive to me that lifetaps around this era were only resisted if the mob was 100% magic immune. They should hit just about every boss in the game.