People! I've realized the most important skill in the game is well-developed machine control, and the main ability is the catapult. These should be upgraded first – Godric, Railag, Faydaen, and the mage, I don't remember his name))) Because in the last battle, you need to break through the magic wall with a catapult, and if you don't do it precisely, it will be very difficult)
I recently completed the campaign and can say that it's not necessary to develop the catapult at all.
None of my heroes had the catapult skill developed, and I easily broke through<