My site is now loading for me in between 1-3 seconds. (Both logged in and out)
1. Using Cloudflare Pro ( I am only using Pro because of the SSL feature for https)
2. W3TC w/ Page Caching: Disk Enhanced and Browser Cache with rules also set in .htaccess. No additional scripts in functions.php nor defer scripts in footer.php
3. I no longer have to disable Page Caching for the Header Cart Widget to function properly. I added wc_session_cookie to the Rejected Cookies in Page Caching Settings. It is no longer caching the cart widget and appears to be helping with caching other elements on the page.
I do not know if this is the correct resolution, but it seems to be working great for me.
I hope this helps someone.