Why my TTFB is so high after CDN, Memcached and 2GB Ubuntu 16.04 Server?

Hi

I’ve a 2GB RAM Ubuntu 16.04 server running a WordPress site. The site has maximum 300 visitor/day. Avg 220 visitors/day. I’ve MAXCDN setup there, Memcached installed to serve pages from cache, WordPress Caching Plugin W3 Total Cache Installed. Still, My site take 8 - 12seconds to load :( I’ve apache2 server running.

The server uses 33% storage, 50/58% memory, CPU Use avg. 10/15%.

Top Process: Apache2 52% MySQL Server 23% Memcached 2$

I was working to keep it under 2/4seconds max. Here is the graph to make it more

I was trying to move MySQL to a different private server but I was unsuccessful and kept all the services in the same server. Here is what I’ve in plan:

Plan 1: If I move MySQL and Memcached to a different server, will I get a better result with Apache2 ?

Plan 2: Or should I move MySQL and Memcached to a different server and Use Nginx as web server?

My Goal is to make the website blazing fast.