I would say choose one among
gzCope, gzPain, gzThreat, GTD
In rare cases, use simultaneous categories.
Also, the relevant posts in the pripri/open blogs, I feel better move to this blog and mark them private. Easier to manage in one place.
GTD is more specific than Cope. In a sense, all GTD posts are also part of Cope but actually Cope is more about job market, moving up, choosing specializations.