In my opinion no resist spells is going to kill you. I say this because almost all of your offense and defense is mana based. If you do the lich spawn for example you will be mana vampired non stop, mana drained, etc. You have a healing stone and a spell trigger stone and some potions and ss for those situations until mana comes back. 120 focus alone is decent for mr but in my experience it isn't enough.
I would go for something like 100 resist and 40-60 necro and just use hailstorm in wraith form with a slayer book. It usually is able to leech enough back to keep going, even with no SS. You have purge magic to pull you out of form (reason some people do 40 and not 60), in case of a fight. Then I think you should be able to put eval back on. Idk I know a lot of people who pvp without Eval, I can't do it but they can so I guess it all depends on your playstyle.
Give it a shot and see how it works out, and let us know. I think no resist is going to hurt but see how it goes.