Instructions
Spend your 28 ability points on the necessary stats for battle clerics. They need lots of strength and wisdom, but not much dexterity because they can wear plate armor, thus negating the need for mitigation. These characters don't need high intelligence scores. A typical build would be: Strength, 10; Dexterity, 4; Constitution, 2; Intelligence, 0; Wisdom, 10; and Charisma, 2.
Fight enemies solo by engaging the enemy in melee combat and healing yourself as needed.
Gear up with items appropriate to your experiences. If you are running out of mana or not healing yourself for enough, focus on obtaining intelligence gear. If you find yourself not dealing enough melee damage, invest in a new weapon and find or buy items that increase your strength.