You can't post in it because it's in the Complete Guides Section, so there isn't anything I really need to change to it.
As for my guide being editted, I just looked at it and I did make the changes according to the date listed at the top of the post, which was 4 months ago lol. I'm not sure why you still see the old version, but it is definitely updated. Let me know if you still can't see the new version.
As for AP, capping DEX depends on your funding. Capping at 80 DEX is completely acceptable for average funding.