Regarding the second approach. This is not officially supported, and it is not recommended by our team.
Could you please advise where this approach was found as a possible one, so we can remove it or disprove it to not cause any confusion in the future?
Please have in mind that our approach is not to evaluate the server template to a Kendo UI template, instead, internally we use an editor function.
Currently, the available approaches are to use custom Window as an editor or/and to submit a feature request for a built-in support.