Team: W, W, E, E, Me, Mo, Mo, Razah (support)
The team consisted of two Ursan warriors, a fire ele, a water ele (Ward Against Harm), a dom mesmer, 2 live insanely good monks, and Razah running a really good support build which I’ll work on posting soon.
We actually dominated this area. The only time we died was when Rocktail blasted us with a siege on the way to the area. We slowed down when the monks needed it, used the corners/walls when possible, and watched for multiple aggros. The Ward Against Harm was the key. Our tanks were able to feel safe that they were going to be healed because our backline was safe in the Ward needing much less attention from our monks. The extra 200 health from Ursan didn’t hurt either. 
In all seriousness, this area should not be a problem if you deal with the groups separately. Ward Against Harm was crucial for the “burning forest” area of the map and a few other charr groups that were heavier on damage. The other groups are easily taken down (albeit sometimes a tedious process) if you simply keep an eye out for over aggro.
By the way, we did have to kill the wurm pop-ups in the southwest.
hi, i cant vanquish this area, the charr temple is closed. I done nm and hm Assault of the Stronghold, its a bug?
I think there is a way in the back(south) that isn’t blocked by any gates. I think it’s right north of the “a” in Sacnoth on this picture:
http://wiki.guildwars.com/images/d/d5/Sacnoth_Valley_map.jpg
Only other thing that I can think of causing that is an active quest.