The phrase "and most amusing of" is correct and usable in written English.
It can be used when describing something as being particularly entertaining or humorous in comparison to others.
Example: "This is the most amusing of all the stories I've heard this week."
Alternatives: "and highly entertaining of" or "and particularly funny of".
In an issue that went to press on January 20th, The New Yorker's Talk of the Town included a piece by White calling parrot fever merely "the latest and most amusing example of the national hypochondria": There have been hundreds of national menaces, keeping us all on tenterhooks, keeping the populace feeling the national pulse and applying the national stethoscope.
There is the best, and most amusing account of a miser's meal when the lawyer first visits the hopeful heir.
Paglia particularly enjoyed polemics against pretentious academics, reserving some of her nastiest and most amusing tirades for the followers of highfalutin French theory.
In The Journey to Reims, one of Rossini's oddest and most amusing operas, a motley cast of characters from every country in Europe, en route to the French town of Reims for a coronation, get stuck at an inn, for want of horses to resume their journey, and have to share lodgings there.
The acutest and the most amusing of all these epigones, though, is Bride of Frankenstein, directed by James Whale (of Frankenstein fame) in 1935.
In nature, a lek is a communal mating area where males gather to engage in flamboyant courtship displays, and females stroll by to judge the performers and presumably choose the fittest, most resourceful or most amusing of the lot.
Most amusing of all is Ms. Leoni's eccentric Egyptologist.
Fantoni provided me with the diagramed deal as the most amusing of the night.
Such works were afterward written independently, the most amusing of the extant texts being Maistre Pierre Pathelin (c. 1470).
Many voices drop by, the most amusing of which belongs to Cedric the Entertainer's old-timer Eddie, huffing under his breath about "smart phones, dumb women" and spinning tall tales about giving "Barry" a haircut when he was a local community organiser.
