whatever doesn't cause pressure points or screw up the overlap of the boot is all that matters really. with FTs, I found that if you work top down when doing them up, the cables will sit more easily in the grooves. And when getting out, you usually have to undo the toe first because otherwise the cable will be too taught to get it off the shell anchor. In traditional overlap boots, I work bottom up so the overlap doesn't get folded improperly by the cuff.