I'm pretty certain that no one other than dwarves can march within 8" of an enemy.
I propose to make a unit of outriders a regular addition to my army. For me their mobility combined with their fireppower is awsoime, plus they swung a critical combat for me this morning when they rear cheaged a unit of chosen kornate warriors on foot with two hand weapons, which were munching my greatswords
. Because of the way I use my pistoliers they wouldnt have been in a position to put in that charge. Viva les outriders!