The most difficult to attack the walls there are two In Guild Wars 2

In general, the most difficult to attack the walls there are two:
1. The top of the walls of the staircase

2. Walls of interior angles

In addition, if the goal is to attack the gates of the enemy,
The gates after is also a good place to buy gw2 gold and put the Arrow Cart

To remember that on the battlefield
And then shoved it is no match for the other army
But the army is no match for discharge full of a bunch of Siege stronghold (Of course, the last strongest the continuous mass graves army ..... If the defenders manpower limited)
Arrow Cart defenders of the main purposes is to prevent the enemy from approaching
Especially to prevent the enemy in front of the construction of the Ram
Arrow Cart placed is the position of the rear of the wall (put the previous point does not help, but it will make the weapons to become the target)

http://www.fpsgeneral.com/forums/battle-chatter/general-discussion/29963-i-would-say-good-work-if-this-was-for-all-devices

http://en.netlog.com/laasddyou/blog/blogid=15922322

http://www.orble.com/i-think-the-gw2-outstanding-has-outweighed-the-bad-for-linux-this-past-year/