Buffing Class(es)???

Does the game have any buffing class?

What i mean by buffing class is that the class/profession that give you abilities to enhance your combat abilities.  Let you kill faster and survive much longer - make you much better than your own level.

Thank you

I think you both took me wrong...

I mean a profession that have benificial buffs that can cast on other players to make them do better...  I had some one casted something on me before but i was not sure what he casted on me.  He is a guardian patcher or team patcher of some sort... i was just standing around and he casted them on me - like  or  of them.