1- Treasure maps.
You cannot get any throwing weapon in Trammel, Felucca, Malas and Ilshennar. This is OK and reasonable. By lore Ilshennar should have some. There was old gargish city there, remember? But even when I am lucky to get ranger treasure map in Ter Mur I am getting ton of bows and crossbows. Warrior maps are OK - you can alter some weapon. But you cannot alter a bow. Please remove archery ranged weapons from Ter Mur ranger maps.
2- Message in Bottle.
There are gargish ships, pirate captains give some gargish loot, but there are no artifacts for gargoyles in chests. Driftwood soul glaive will be good.
3 - BMV Ararat - shadowlords have artifact crossbow (bane) but not a Soul Glaive
4- Stygian abyss Medusa has a good artifact composite bow and no throwing weapon
5- Eodon - Aloron armor set is not alterable.
Currently only usefull arties are Covetous Blight of Tundra (lesser slayers, 100% cold) and Valkyrie Glaive. There are no throwing weapon for ninjia (like Yumi) and throwing has no impact on shuriken throwing (silly, yes?). Also throwers have no wooden throwing weapon. Boomerangs should be wooden. Dont know if Fey slayer from gathering Evidence is good - cannot make Rouser to spawn a quest mob, even I killed lots of them.
Proposition to add new artifacts to : Minions of Scelestus (book quest reward for killing tons of them is really so low!) and Night terrors.