Every class in this game has abilities that can be used by other classes. Besides the various combat classes, there are also crafting classes. Crafting can get complex and difficult in this game but if you have the right cross class abilities unlocked, it gets kinda easy! If you are thinking about crafting, I recommend going over this post since it lets you know some of the basics and why getting to at least level 15 in every crafting class is a good idea.
Also, feel free to ask me questions in game about crafting. I've done quite a bit of it and I may not be an expert but I can get you in the right direction usually.