I am kind of new to this and these are the builds I have use in previous characters that seemed to work quite well in my eperience.
Battle Cleric:
Vit:2
Mag:2
Str:1 Variable for gear
Plate/Heavy armor
Mid Cleric:
Vit:1
Mag:3
Str:1
Light Armor
Healer Cleric:
Vit:2
Mag:3
Str:Only for gear requirements
Arcane Armor