First of all, this game is great. I've done a few runs when experimenting with setups and skills, as well as finished it a few times, and Steam accuses me of having spent 83 hours on this game.
I've finished it with fighter/roguex3 group, a mixed fighter/fighter/rogue/mage, as well as
What bugs me with this game is the same trap most other games fall in. You have mages, master of magic/elements, but completely useless after casting a few spells unless they can spend alot of time resting or wasting resources on potions to restore their energy.
What I would love to see in the form of a mod, or something the devs would consider for future games, is allowing the mage to cast his lowest level spell "for free", in the same manner the other chars can use their weapons with no energy left. The damage potential doesn't have to be great, it doesn't need to include flashy side-effects, but it would remove the "no energy equals useless" part of the mage.
For me personally, this would give mages the ability to be as useful as any other class, as well as giving an element of strategy where you prepare for a difficult fight by making sure energy is at top - or gulping down potions midfight to be able to get off a shield or a heavy damage spell to finish a hard enemy.
Anyway, thanks again for this great game, and keep up the good work.