very simple when your gap reaches 9, every time you level up,
you level up your cleric mastery level
now the items you lvl up under cleric will depend on how you are playing this char (you dont want to lvl skills you wont use)
for example if you are only being plvl you really dont need any skills
if you are being lvl'd in party then you want the heal, & buff skills
if you are solo grinding you want the attack & heal skills
Also you must choose whether you will be full int, str or hybrid
of course you know full int will give you more attack power
str best defense but not much umph (ability to kill)
hybrid your choice of how much of each you want
