It has a 6-turn cooldown (to be fair, I never had to recast it. By the time it's off either the enemy is dead... or I am).
And you really want to boost 2 people with leadership while the second person only affects one single team-member? Doesn't seem that efficient to me. Then again, there's not that much alternative for your points in civil abilities.
Leadership 4 gives 5 points in initiative. That can be a life-or-death thing on harder difficulties, especially with the new concentration on surface effects and environmental magic. Being the first to stun/knock down/freeze/burn/teleport etc. your enemy can be key to winning the whole encounter.
And true, there isn't much to do with your civil abilities anyway...
