I might be just me but throughout my playthroughs, having a healer seems useless. Mainly due to enemy damage is far greater than the amount you can heal at a given time. I would like to suggest a minor buff to healing to make a healer more viable or change healing spells to a bonus action. I found your better off using a damage dealing spell than a heal. Again it may be something I am not understanding but I have 100 hours in the game and found no reason to use a healer. thanks
