Chomp and tar as unusual? In vgc 2012 and the beginning of 2013 they were almost commonplace...You forgot to account for Garchomp and its mega for sandstorm teams. It may be slightly unusual to run both t-tar and chomp, but normal chomp gets sand veil, which isn't banned in VGC, and mega gets sand-force, which'll definitely help to sweep. Mega-chomp might even be viable in TR teams, with a negative nature and 0 IVs.
And yes, this IS in the wrong sub-forum. I think you should request a mod to create a VGC 2014 thread.