Suggestion: Cleric Class

Just an idea.

Cleric Class: Uses a new type of damage - Holy/Purify
Mace and Shield User, High defence but low movement speed.
Support ability's for group gameplay and possible healing magic at the cost of using both there own mana and health potion charges to heal others.
Divine summoning subclass - Different types of Angels that can be called upon temporally.
Cannot use Corrupted items.

I am surprised it isn't a class to be honest as you are dealing with corruption and the undead as the premise of the game.

Con: Everything is corrupted/undead so would have to consider deeply what would have a weakness to Holy/Purification damage.

Just a few ideas. What do you guys think?