Cleic production Skills Guide in Fiesta
We suggest starting off with Decomposition and Scroll Production or Decomposition and Potion Making. Decomposition comes in hand later on in the game when you have a ton of higher tier items that you can't use for producing anything. Just keep working on them and you'll be fine. Also, keep in mind, In order to make fiesta Gold in Fiesta, one must stop leveling.
The point is that you can take items of some quality and either makes lower quality items or fewer higher quality items in Fiesta. Generally, your production skills will lag behind your levels, and as such, you'll start getting items that are higher quality than what you can make. Decamping allows you to use those items for your production skills.
When you need higher tier quest items than are dropping for you then you can comp up what you do get. When you are overloaded with mats you will eventually need just comp them as high as you feel like to save space. You do lose some of the mats, but you gain space until they are needed.
Do not make potions on your cleric. You will seriously not use potions unless you are solo boss farming. And if you solo your quests you will literally have stacks and stacks of pots from picking up your drops. Also potions are the least money making skill. Scrolls are useful; they sell well, and at a good profit. Stones are decent money from the high drop rate of dusts, but a lot of people make them.
Scrolls and stones. But you will need to level (fiesta online money) a comp/decomp production character along with the production of your other skills. And Fastest is a relative term. You will have to spend hours and hours making things, and more hours sitting in a vendor. We suggest getting at least one iron case the next time they go on sale. You can load all 4 pages, hit produce, and walk away for over an hour depending on what you are making.