I can supply some additional data for you (PM me if you want to see the data gathering spreadsheet).

For Conjurer Cures, each 2 points of Mind adds 1 point to cure amount, and each 3 points of Magical Potency adds 1 point to cure amount. No cap that I could discover (and if there is a cap, it is above the MP pool based on Mind).

Just these two value can completely predict cure amounts, and I have been unable to find any other factor.