When it comes to synonyms for the phrase "most hortative," there are plenty of options to choose from. For instance, one could use the term "most encouraging" to convey a similar meaning. If one is looking for a more assertive synonym, the phrase "most imperative" could be used instead. Alternatively, "most motivating" or "most inspiring" could be substituted for "most hortative" to emphasize a sense of motivation or inspiration, respectively. No matter the synonym chosen, all these terms share the common thread of being supportive and persuasive in nature, urging others towards action and the attainment of their goals.