Author score has much more to do with earnings potential than does any single hub. If you are looking for the most earnings potential, then do some research here and only write hubs on the most browsed topics, and make them long and detailed. This would at least put you in the path of the traffic, and a top hub score would get people to look at your hub. Still, in order to get the maximum exposure, you want your author score to be at least above 90. This involves with interaction in the community in addition to publishing great hubs.