Is your goal just to have a high HubScore? If so, then you are on the right track. However, once you are over 75 (the no-follow/do-follow threshold for outgoing links) most people start to look at their audience or their earnings. And a high HubScore isn't necessarily indicative of having either the amount of traffic or earnings that you desire.
Also remember that HubScores don't have any meaning or influence outside of HubPages.