[1.2.322] Moar Skill Balancing

I want concentrate to lose the cooldown. Or at least give it a 5 min cooldown so that the intervals between castings and expired buffs is 60 seconds and not 120 seconds.

I mean common, everyone else gets their attack buffs increased without cooldowns. Sure sharp eyes is cool, but 35 w.att to even out the current gap between Marksmen and their new found power would be great.