lol, all of you forget the one other important aspect that berserker attack gives, self buff of 20% toughness for 30 seconds, thats a pretty lengthly buff given the fact that iron body only works for 12 seconds and is only 5% higher toughness, and the only other compairable move is aerial takedown which gives a buff of 10% toughness for 30 seconds. So by using berserker attack, you can buff your toughness up by 20% for the 30 seconds, and should you lose a roll and become powerless/stunned, you'll be able to take more of a beating and not take as much damage per hit. For thoes of you who have no clue how the current combat system works, the higher belief you have, the higher toughness you have, which translates into a higher damage absorbtion. So higher toughness = more damage absorbtion, so when somone's sidekick combo does less than 50 damage to you, you'll be able to take one heck of a beating and sustain little damage. So the move isnt entirely useless.

I think it's pretty much useless as it wastes IS saving some of your HP when you can use a special ability to roll higher and save you from damage at all while also doing damage to your oponent