In ~12 days, beginning 25th August, there will be an Event in Guild Wars (1!!) called the Wayfarer's Reverie..
Within the event there a four Quests that reward you, amongst other things, with Proofs. Bringing all four Proofs to Fylinn, Sworn to Winds will present every account that hasn't completed these quests before with the option of choosing a Reverie Gift, which contains a random Tormented Weapon befitting the profession that opens the gift.
To complete the monument of Valor in the Hall of Monuments you need at least 1 Tormented Weapon. These are very difficult to obtain, especially nowadays. I therefore strongly suggest that anyone who at some point would like to join us GWAMMs and hasn't got a Tormented Weapon yet, should participate in this event.
A few more hints and tipps to achieving GWAMMness can be found in this thread.