There is some truth to this. The problem is, some classes can not really be played very well. I'm looking especially at the GF here, since its quite slow and the extra damage resistance it has is not only negated by its low damage, its a horrible disadvantage thanks to most of the metagame. For farming or solo play the gf…
Buy the best weapon (highest damage) you can get on the broker. Use Knights challenge on the boss and block that damage while pummeling it with your other encounter abilities (charge and surprisingly bull rush does good damage too, considering the cool downs) - it fills your action points like mad so you can use daily…