This .conf talk that @martin_mueller gave in 2016 and 2017 is a good lispy resource; it includes demos in the Job Inspector as well as some theory behind best search practices. In fact he also wrote the second Answers link you shared!
2016 Talk
Recording: http://conf.splunk.com/files/2016/recordings/fields-indexed-tokens-and-you.mp4
Slides: http://conf.splunk.com/files/2016/slides/fields-indexed-tokens-and-you.pdf
2017 Talk
Recording: https://conf.splunk.com/files/2017/recordings/fields-indexed-tokens-and-you.mp4
Slides: http://conf.splunk.com/files/2017/slides/fields-indexed-tokens-and-you.pdf
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