While there are many synonyms for the phrase "most asserted," some of the most common include "firmly stated," "repeatedly declared," "emphatically affirmed," "positively asserted," and "categorically proclaimed." These phrases all convey the idea that a statement or belief is being confidently expressed and strongly supported, but each one has its own subtle nuances that may make it more appropriate or effective depending on the context. Thus, when choosing a synonym for "most asserted," it is important to consider both the literal meaning of the word and the connotations that it evokes in order to ensure that the message is being conveyed clearly and accurately.