For the Wind Oxen Jutsu, is that an additional bonus on top of your normal modifiers (Str + size usually), or does that replace them? Also, what action does it take? If it's a swift action like most Ki Powers, that's great (remember, movement from bull rushes provokes AoOs, and heck, swift action movement). If it's a bonus on top of your normal modifiers, that's also awesome (crazy bull rush modifiers + Dungeoncrasher = fun times). If it's both, then it's freaking awesome (although I seriously doubt it)!