The Ottomans were really smart

[Norse]

Put white people, balkanite Janissaries, to run your empire, then spend all your time doing what you do best: degeneracy in the harem (run by your mother, mama boys) and killing of your younger siblings.

Much respect for admitting your own limitations

[Crimson Winds]

Janissaries didn't run the empire except some regency shit happened, even these times they shared their power with their ''Valide Sultan''(Queen Regency). Also, that periods mostly occurred during the 17th century when Jannisary system heavily corrupted and had mostly Turkish or Albanian background. Ottoman viziers had predominantly Turkish origin followed by Albanian, Bosnian and Northwest Caucasian (Abkhaz, Circassian). Also, yeah state-sponsored fratricide was a quite progressive way to choose succession problem in Turkic societies.