dungeon farming is quite profitable atm. The items needed for relics that drop in The Wanderers palace sell well on my server. Also any of the mats you need to buy for allegan tomestones like coke will net you decent gil. Simple mats for crafting seem overpriced right now too, stuff like diremite webs. The trick is to see what the average level of people learning crafts is on your server, find out the popular recipes they'll be exping on and go gather those mats.