I agree with the general thought, that the 9k/30 rule set listed is a good idea/base, but needs to be tweaked quite a bit to be made into a reliable ruleset.
Ie. 2pts for fire wizard level 1 *2 = 4pts for fire wizard level 2 doesnt quite work out like that fairly I think. Though was a simple solution to a difficult problem. A level 2 wizard can be ALOT more powerful, I would imagine with the exra item capability and spell. Trying to use it as a example that each units level increase wont be a universal multiplication every time.
I feel that its possible that the only way to do it is to create a points list for every unit's level as well as a point system for (armor?).
And a level 4 gobo (As a example of a weak unit) wouldnt be a core choice anymore. Though I heard that upgrading levels in DO doesnt improve online stats??... dont know about that.
Some thoughts,
Id love to see a strong rule set for 9k