Wordpress speed

Hi there

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Fresh centminmod install on a vps with 4 CPU’s / 8gb ram. Planning to run multiple sites.

Wordpress install is getting a TTFB of 1.5 to 2 seconds and page complete in 5 seconds on average.

I have disabled all plugins and reverted theme to twenty nineteen.

This obviously improves things drastically and ttfb is then 0.5 to 0.6 seconds.

I am using cache enabler, autooptimze as advised by the guides everything is functioning correctly.

What is the best way to reduce ttfb for Elementor / Jetengine themes?

Thanks!