Originally Posted by Slyver

Sage would be good so you could make your own spells. Once you have your spells though you are done no more use to being a sage. But if you are looking to make money as a sage they really don't make money off the broker but if you go Looking for Work(/LFW) alot then you can make some decent money.

I leveled a sage so I could use the biproducts of spells so I could make some money on my alchemist. If you are looking to make some money at tradeskilling a good choice would be a class that has expendible items. Alchemist(Potions/Poisons), Provisioner(Food/Drink). But you really don't start to make money till you are in T7 where most people buy those items.