Moving on from princesses to witches and due to it being a return to it's roots I may have to tweak some elements.

Mirai and Riko have the honour of being the best Precure duo in the franchise only matched by one other duo and the original, but unlike the classic lovely angel trope that the franchise began with Mirai and Riko take a different approach.
Both girls mix well due more to their style in magic and personalities, Mirai being a performer and Riko being a technician, the extrovert Mirai to introvert Riko which relies less on tropes and utilizes more of the characters and this plays so well that you would believe they are real girls which is strange to talk about being an animation but real life girls don't follow the tropes that groups them into categories and that's impressive.
Hanami as the 3rd precure is nothing like Luminous in the original. Starting as an infant fairy and growing into a beautiful graceful Precure fairy through the parenting skills of the lead Maho girls is probably when the series really starts talking to their former older fans who by that point in the franchise are now young adults and while this acknowledgement doesn't return until Hugtto it really gives some emotional, mature weight that later sees it's two leads become an actual couple. That's how you make strong female characters.
Asahina Mirai - Cure Miracle - 9.5/10
Izayoi Riko - Cure Magical - 9.5/10
Hanami Kotoha - Cure Felice - 9.7/10
Best Dressed Award - Cure Felice, not only the best dressed but the most beautiful Precure in the whole franchise both in looks and personality.