Is a HDMI dummy plug absolutely required for mining XMR at 1850+? or is it just for ease of use when using remote desktop?
Is there any other suitable alternative (aside from a monitor)? as shipping seems to be obscene in time-frame.
And does it actually have to be connected to a powered-on monitor?

Also, I'm using this guide to create a start-up script;
http://vega.miningguides.com/p/auto-run-miner-without-hashmonitor.html

Where is says;
Find the section of code shown below and replace the underlined portion with the miner name of your choosing.
start "XMR-STAK Unified" xmr-stak.exe --config config.txt

what would be the appropriate equivalent for Cast XMR miner? (cast_xmr-vega.exe)
I load this miner with 'xxx.bat'

would it simply be;

start xxx.bat?