Don't worry about training in CM unless the training points are readily available. The cost for CM is high for a pure. A wizard is better off training up their perception 2x over even worry about starting CM simply based on the fact that CM/Perception/PF/Dodge are all weighted the same for SMR defense. It's more cost effective to train perception 2x first for a pure over trying to train up CM or Dodge ranks. Once you finish maxing out your perception ranks (most likely done sometime after you've capped) that is when I'd start looking to hoarding training points to put up CM and once you max out CM then look to training in Dodge since that one is very expensive for wizards.

In terms of training it should be something similar to what kutter posted for a standard pure build.

Spell ranks can vary from build to build, even with basic pure builds. Most will stop at 76 for MnE and then split the difference between MjE and Wiz spells however they see fit.