I'm posting this here instead of in the bestiary thread because it directly relates to the Ascension rules.
I wanted to see how the rule for Outsider advancement would work out using your new rules, so I tried it on the Solar, making something more worthy of your declaration that there should only be one Solar per Solar System.
http://d20npcs.wikia.com/wiki/True_Solar
Comparing with the Cogent, of the same CR, I see that the True Solar has about a third the HP, slightly less initiative,
far slower speed, comparable mortal-level SLAs but none of the epic level SLAs, weaker stats, weaker saves, weaker save DCs...
In general, the True Solar is weaker in EVERY SINGLE REGARD than the Cogent, far weaker in many cases, despite being of the exact same CR. One of the two CRs is obviously wrong. Which one though?