Taking Basch/Balthier/anyone who is low on MP and bravery haste berserking them is a standard routine for me.

I keep balthier equipped with light ninja swords, so esp. with genji gloves he gets a lot of hits off, but berserk likes to miss on him, but basch will take to it with the first two casts, so I prefer to not bother wasting time casting berserk over and over. Berserk in itself increases your speed, so with haste, it's <3