by T.D. Thornton-Last Saturday's news that the No. 1-ranked Paladin (Gun Runner) will miss the GI Kentucky Derby with a non-displaced condylar fracture of his right front ankle created a vacancy atop this list. Any set of Derby rankings abhors a vacuum, but it wasn't easy deciding which of several worthy candidates out of the GI Florida Derby and GI Arkansas Derby would take over the kingpin slot. 1) COMMANDMENT (c, Into Mischief-Sippican Harbor, by Orb) O-Wathnan Racing; B-Lee Pokoik (KY); T-Brad H. Cox. Sales history: $485,000 RNA Wlg...