This is my observation from grinding mobs and not from PvP as I don't do PvP.
1. Decrease the cooldown to eight seconds.
2. Increase the range to forty yards.
Doing these two buffs to the skill will make the Paladin class that much more enjoyable to play with.
And one last thing that I want to say is that the damage needs no buffing at all as far as I'm concerned.