I do not recommend using standalone Apache server for a production site because it can consume more resources. So, NGINX with FastCGI cache is a way to go for handling high traffic WP Blog in a budget. You can expect to achieve TTFB near 50ms (In real Chrome Browser).
CW uses hybrid combination (Apache+NGINX) leveraging best of both.
Minifying HTML can save few bytes however double check web page design. Sometime elements may come too close and look bad.
For LiteSpeed (Enterprise), there is a host called “Closte” based on Google Cloud. [I do not recommend at the moment, I mentioned this name just for informational purpose.]
For OpenLiteSpeed, DigitalOcean offer one-click solution that’s worth trying.
I recently tested, this was my experience with it.
I think this was due to Quic.Cloud services integration which comes in LS.