Quote (xfer @ May 31 2012 10:07pm)
So it all seems to stack in favour of upgrading res rather than armor.
This depends entirely on how you, as an individual, play your class. Most elemental damage originates from ranged attacks that, with the assistance of a couple running speed improvement mods, you can easily dodge. You are a caster, and therefore shouldn't get hit--you are the one doing the hitting and the obliterating.
What you should really focus on is how well you tank physical damage and how well you can escape from uncomfortable situations--such as losing your right to movement and than having the champion teleport right on top of you only to crush your skull into nothingness. This is the defensive part of your build, of course. The important part comes next:
Make sure you hit hard. Make sure you can stand there, in the face of an elite mob, and simply melt them down--not literally, of course.