While the dash is out, if I were you I would seriously consider adding the two allowed braces between the A-Pillar down bar and the firewall as your 7th and 8th points. Extra foot protection is a good thing, and any competent cage guy can knock that job out in no time, so it shouldn't cost much.
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Well we are the cage guys, I am a J.H. shop teacher and so is my dad, so we will be making the modifications ourselves. A friend of mine ownes a limo shop and has a hydraulic tubing/exhaust bender that we can use.

So where exactly would you connect to the firewall?

I also have been looking at the pictures in the Tech Center of the CRX build. Is everything in those pictures ITA legal as far a cage mounting/attachment points, the welded in front strut tower brace, etc? These are great pictures and give me a lot of ideas for our car, I just want to know if they are legal before we copy.