[quote="Assirian":1qq2nacq]How do you think, what is better to have: high SpellSave or resist?
Or, maybe, these things are absolutely incomparable?

As I understand, high resist can save up to 98% of damage, but only for cold/fire based attacks.
And SpellSaves gives only 50% on each spell, and there is a chance of being unaffecting.
Is it true?
[/quote:1qq2nacq]
When opponents blast fire/cold, resistance helps more than -spellsaves. However, -spellsaves helps vs. other types of blasts, mobs casting blindness, poison, and other things.
Since fire/cold attacks are quite a bit more common than the other things I cited, +resist equipment will serve you better overall.