Maneuvers is good for your own personal attempt at increasing/capping defense. I think it is of lower desire on a team level in the end game phase since a number of players have their own defense so high as well. Assault is good by default if you have room for a power needing a single slot. I think in the day and age of IO sets, it losses out a little bit. I would rather dump it for Hasten. Tactics with +4 content being such a norm works for me. I haven't tried the others as I don't find a lot of builds open enough to take three Leadership powers. Once I grab from primary, secondary, travel, fighting, epic, and Maneuvers as a template, there's very little room for anything else.