In my opinion this makes the most sense:
Bards can utilize any one of Intelligence, Wisdom or Charisma. Some Bards focus on knowledge, others draw power through some form of performance, and historically Bards were associated with Druids and great wisdom.
Clerics should be Charisma based. They are attempting to convince a more powerful entity to grant them power.
Druids should be Wisdom based. They are drawing upon the power of nature and the elements through their own will.
Paladins should be Wisdom in this edition. Their power comes from their will and focus upon their Oath. In past editions I would consider Paladins to be Charisma casters for the same reason as Clerics.
Rangers should be Wisdom based for the same reason as Druids.
Sorcerers should be Wisdom based because the must channel their power by the force of their own will.
Warlocks could be Wisdom or Charisma based. They are either using their will to channel power that has been given to them rather than learned through study, or they are convincing another entity to do something for them.
Wizards are of course Intelligence based. Their power comes through study and understandingredients of theory and rituals.
Bards can utilize any one of Intelligence, Wisdom or Charisma. Some Bards focus on knowledge, others draw power through some form of performance, and historically Bards were associated with Druids and great wisdom.
Clerics should be Charisma based. They are attempting to convince a more powerful entity to grant them power.
Druids should be Wisdom based. They are drawing upon the power of nature and the elements through their own will.
Paladins should be Wisdom in this edition. Their power comes from their will and focus upon their Oath. In past editions I would consider Paladins to be Charisma casters for the same reason as Clerics.
Rangers should be Wisdom based for the same reason as Druids.
Sorcerers should be Wisdom based because the must channel their power by the force of their own will.
Warlocks could be Wisdom or Charisma based. They are either using their will to channel power that has been given to them rather than learned through study, or they are convincing another entity to do something for them.
Wizards are of course Intelligence based. Their power comes through study and understandingredients of theory and rituals.