High Performance & Compatibility: NGINX, HHVM or PHP7, MariaDb

Hello,

OBJECTIVE - Hi-Performance WordPress VPS hosting with VirtualMin with Nginx, HHVM, MariaDb.

I'm new to VirtualMin, installed one "10 Domain" paid version so far. I love it but hope I can setup a great WordPress platform as described below.

I would like to setup a VPS (e.g. DigitalOcean, Linode...) with VirtualMin to host several WordPress sites including WooCommerce sites with high performance components:

(a) NGINX web server,

(b) HHVM with fallback, in case of error, to PHP 7 or PHP 5

(c) MariaDb instead of MySQL, for performance and stability.

(d) Other performance options such as memcache, if possible

I read the following post https://www.virtualmin.com/node/37170 but it is more than 13 months old.

I would appreciate advice about the current state of VirtualMin to support at least (a) to (c) high-performance components.
<> How can I install (a) to (c) on a fresh VPS server with VirtualMin?
<> Are there some pre-defined setup scripts or examples?

<> Also, do you have a way to search your forum using keywords?

Thank you.