Can you obtai legendary +wpn dmg % and + elem dmg % with ruby?
You also have the darkness talent on your amulet even though you don't have any blinds on your equip. Maybe swap it out.
No you cant, its a vacuus scorpio and nadroji robe which have it as a set affix
Nope, have a look at this guide. http://forums.dungeon-quest.com/t/crystal-crafting-restrictions/3694?u=cuzegspiked