Have you tried using Forge Stones? Mystic Coins?
Even better I think the NPC right next to the forge (Miyani) has a 200 Skillpoint item called Bloodstone Shard (wiki: http://wiki.guildwars2.com/wiki/Bloodstone_shard) which should be interesting for you
edit:
checked the wiki again and found this list here: http://wiki.guildwars2.com/wiki/Legendary_weapon