WordPress not updating

So I have a wordpress site with around 745,000 pages. This are the issues that I have been experiencing, some of which I have learnt to work around but now I have issues that I cannot work around and any help will be greatly appreciated.
The site in question is http://www.poweraidus.com

Issue 1.
A while back my visual editor dissapeared and even after making sure it was enabled under settings it still never functioned. I use the text editor and it can be a pain.

Issue 2.
I cannot access my pages I get a WSOD (white screen of death) on the “pages” section of the dashboard. I thought it was a memory issue. I found out that along with the php.ini memory limit, wordpress has a limit in wp-includes/default-constants.php – I tried upping that to 512M from 256M and the customers cpu went nuts and never sent back any results. So I can only edit a page when it is open and hit edit at the top but I cannot edit all my pages or delete a page if I wanted to.

Issue 3.
This is the mother of all issues. My site is no longer updating. I have checked all my cache and it doesnt seem to be a cache issue. Any new blog that I post doesnt update on the site but when I am logged on the dashboard, I see the updates, the moment I log out, I cant see the updates on the site.

WordPress community please help me troubleshoot this three issues please.