Making decisions on the basis of what seems best instead of following some single doctrine or style WordNet 3.0 & Open English WordNet

Eclecticism is a conceptual approach that does not hold rigidly to a single paradigm or set of assumptions, but instead draws upon multiple theories, styles, or ideas to gain complementary insights into a subject, or applies different theories in particular cases. Wikipedia

A philosophical movement Wikipedia Disambiguation

Conceptual approach Wikidata

A conceptual approach that does not hold rigidly to a single paradigm or set of assumptions, but instead draws upon multiple theories, styles, or ideas to gain complementary insights into a subject, or applies different theories in particular cases (source: Wikipedia). OmegaWiki

An approach to thought that draws upon multiple theories to gain complementary insights into phenomena. Wiktionary

Philosophy: approach that draws on multiple theories. Wiktionary (translation)