to be honest if you want to make fast easy money just do dungeons as a tank if you want to put some effort into it and gather your materials and make a crafting item pick something that sells constantly like leve turn ins or job class turn ins because at this stage of the game people need these items cuz its quicker to level those jobs and class quests(needed for high level crafting). good luck i've found my niche but if i tell ya then others will start and kill the market. Just remember when you find something that makes you money thru the market board don't spread it like butter otherwise others will do same.