Well...apart from the builds that were already posted...This one is quite fun, but it might not be extremely useful in siege battles...
Level 30
Strength 9
Agility 33
PS: 3
Ath: 11
WM: 3
2h wpf: 130
I've tried this as a skip-the-fun alt, and it's a lot of fun. You can actually take down pretty much everyone after a while, although it takes a long time to kill a heavily armored player. Archers and the like still go down in 2-3-ish hits with a Katana.
In siege battles, your movement is usually more limited and you're likely to get rushed at by a lot of people, so I would suggest against going there. (on the up-side, you're almost as fast as a cavalry player
)