Complex sentence: Trolls were violent berserkers that due to heavily weighted offensive bonus points could do extreme damage to those much higher in level then themselves, however this ability costs them a great deal of defense and the lack of bonus points in other areas was a disadvantage as well.
Split into simpler sentences: Trolls were violent berserkers that, due to heavily weighted offensive bonus points, could do extreme damage to those much higher in level then themselves. However, this ability costs them a great deal of defense and the lack of bonus points in other areas was a disadvantage as well.