Mostly the list has been ranked on the level of division in which they managed. Level is of significant importance, often overlooked. Its obvoius to anybody its harder to manage the higher the level, we have seen this already with LW, seen as great at tier 5, move up to tier 4 and suddenly he does not look like pep anymore
Also they were then ranked relative to the level, on usually how well they did, ie play offs, promotion etc