Priests are the best of the 4 starters when it comes to 1v1. But sadly they are the worst dps. You could spned more time leveling one of your priests than it took you to level both your mages and probably one of your warriors! You can buy aion gold here. Another sad thing about them is though they are more mana efficent than the mage they do run out of mana every once and a while, which is not as easy to gain back as health which you can both bandage and pop a pot to regain.
Here you can get cheap aion kina. The nice thing about priests is they are the turtle in the game. They're slow but steady. You can kill monsters with little mana loss if you can get a good rotation down. gaining health back instead of bandaging is a single heal away. They are also a higher armor class and can use shields! This makes it so these guys just do not die ever.
If you die as a priest /quit and never play an mmo ever again because it does not get easier than these guys! You could suggest warriors over priests however to noobies as mana management is something most noobs just cant grasp the concept of. They go balls to the wall and wonder why they die when they're out of mana while fighting 3 guys at once. Priests really do give you that feeling of immoratality which priests unfortunately enough do come just shy of =P. You can buy aion gold.