Guardian is by far the best fleet commander class. Please check the 'Faction Bonuses' and 'Class Bonuses' tabs and see if you agree with my evaluations if you want me to bump any up or down let me know, but the average should stay at around 2.5-3 for each. Please note that the evaluations are extremely subjective, and basically what I did was ballpark the relative value of each faction, then ballpark the relative value of each class, and add them together for each hero. You can see the combined spreadsheet here. I have compiled a list of all hero skill trees and class skill trees as a quick reference guide and used (rough) evaluations of the various trees to come up with combined evaluations of every hero and what they are best suited to do. (moved this to a more appropriately titled post since I'm putting all my evaluations here)