A dedicated forum for discussing professions, I suggest that one is retired.
No posts, and I'm not sure how much more we could discuss professions after 11 years of Guild Wars.
An alternative idea would be a "Skill-of-the-day", or a "Skill-of-the-week".
For each period, day or week, a skill-topic is started where people can post all their ideas, theory crafts, builds, basically anything that's allowed and within topic. After a set period of time, the topic is locked. Possibly several skills open for dicussion at a time for various professions.
Either way it's surely more interesting than discussing professions
EDIT:
Since the forum is within "Builds" section, I guess it should follow suit. So perhaps a "Build Wars" forum where people try to come up with clever builds based on strange skill combinations set by the mods