Cleric in Fiesta Online
Actually, Clerics are a dynamic class to play; they can fight, or be support. If there are very few clerics, it's probably best to be support and heal everyone that needs the healing, especially your own party. This also involves scanning through players to make sure that they are at full health, and always pay attention to what people are saying, many times someone doesn't have a cleric in their party and they yell out for a heal.
If there is lots of healers, and you can also help attack, or even tank if you have the right build. This method is for experienced and smart players. It involves healing yourself, and using bash to control the aggro. Then the fighters doesn't mean your should stop healing people just for you feel you are as strong or stronger than the fighters. There is usually someone that needs a heal or two.