I'm going to chime in as yet another Bard who seriously wishes that more Warriors used just a simple macro like this for Berserk:

Code:
/micon "Berserk"
/ac "Berserk"
/wait
/p {Berserk} used! Pacify in 20s. <se.4>
That's all I need as a Bard to know "Oh hey, I should use Paean some time in the next 20s." Because, as others have stated, Berserk has a pitifully low priority as a buff, and by the time you see the pacify, it is often too late. Its one of those things where the UI's limitations prevent those of us who really want to optimize our Job's potential from doing so.