I have an Elementalist, which belongs to the holy trinity category, and I am not proud of discrimination... I made an Assassin, which is certainly the most useless class in DoA (i really don't see any effective application for them, even a mesmer could do better job :s) is just not made for this type of "elite" zone : The true problem comes from the too many professions in GuildWars
Basically, the holy trinity can do any job quite easily, and the other professions are here to make some diversity in the meta game, but I have to say that my Sin is not really usefull for any group in PvE...
Elitism is another enormous problem : the DoA seems to follow the dark path of the HA, with ranks which is a bad thing : you can gain ranks with a noobish BoA sin in HA easily, it won't give you more experience
I think that most profession can play with fun, like a Ranger bonder, a restauration Elementalist, or anything fun, even a healer sin if it's fun : "elite" zones are just not made for this.
It is like there is 2 games in one : one fun, very fun, made of experiences, new builds, sometimes crappy, fun pve, fun pvp... and the other made of farmers, ultra rich players who have infinite time to sell stuff at ridiculous prices, elite in HA with their so-called bambis and wolvies, and a new elite PvE players : the dark side of GW.
And I'm affraid this will never change, it's the way it is, no revolution in the oligarchy, they rule, that's all


), of be a famine for the Monk + Ranger combo.