Call me the day you'll fill 9000 supply with 1500 illum i'd like to see it
anyway, the crusader ability has an other advantage, its a dot (damage over time) so it means the enemy ships you fight all take damage in range, means that half hull passive repair is used for all those ships, its a nice boost and its also bothersome because when you see all your fleet under attak its quite harder to see witch ship the enemy is on focus.