By Ben Cleminson WHAT more can you say about Willie Mullins? He came into this year’s Dublin Racing Festival mobhanded as always, but to win all four Grade Ones, the first three all ridden by his nephew Danny, is just another example of his genius. Yes, he obviously has the best horses and the biggest spending owners, but he still has to do the job and produce his horses at their very best. Danny was the lucky recipient on Saturday afternoon, remarkably landing a 535/1 Grade One treble. First up was Dancing City who fought off stablemate and favourite Predators Gold to land the Nathaniel Lacy …