ToME: the Tales of Maj'Eyal

Hi folks,
Never really used Rune of Rift much but I have it on my cursed just now. Does it scale off willpower? It seems to be doing ace damage but gets resisted nearly all the time by anything that I'd want to hit it with. Even bog-standard skele warriors and the like are shrugging it off and I have a decent 44 mindpower. Is it just a bit rubbish or do I need cunning or something to get it to stick?
Cheers,
Doug

The damage scales with Willpower, but the hit calculation is spellpower vs. Spellsave. It can also crit (with spellcrit). It's a bit of an oddly designed inscription.

Thanks, that makes sense as I had high willpower but no spellpower. Doesn't matter much now as I died in the ambush after dreadfell when I woke up after losing but died to poison which I had not noticed was still on me!