My comment was to long to fit under the article 
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As part of the holistic mindset I would probably count sociotechnical theories and research eg. Team Topologies and Wardley Mapping. The later is still a fave of mine for strategic understanding. Also holistic (but not exclusively the Holistic Test Model) could be using theories to understand company culture. Hofstede cultural dimensions as an example.
I’m not sure where to put a more “outreach” mindset, where you consider factors outside your delivery team and daily grind. Where the staff-level testers often play and address company strategic programs etc. It’s not inclusive, as it’s not specialisms draw into the testing, but where testing mindset is making an impact beyond software application testing.
Good thing to list these 11, they often overlap and hat’s ok. They key is to think about the testing 