| Interestingly, I always ignored alignment and favored class in D&D.
On classes, I think that a psion is slightly more powerful than, or equal to, a magister, so I'd allow them in if you have psions.
I don't really see templates as a problem in light of the kind of damage a D&D PC modded with the Complete series can dish out. Plus they have a cost to use.
I think the biggest issue would be energy vs. elemental damage. If you disallow elemental and make it all energy, that's probably easier.
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