Give magical heroes more advantages in magic and combat heroes more advantages in attack and defense, but in a balanced way. Otherwise, a warrior, by increasing their attack and defense, increases it for all units, while a mage, by increasing their magic power and knowledge, only increases the power of the spells they use a couple of times in a battle. Therefore, it is necessary to give mages the opportunity to cast spells more often without spending a learning slot, and so that magic is much more effective than for a warrior. And so that a warrior doesn't have this ability.
Give magical heroes more advantages in magic and combat heroes more advantages in attack and defense, but in a balanced way. Otherwise, a warrior, by increasing their attack and defense, increases it for all units, while a mage, by increasing their magic power and knowledge, only increases the power of the spells they use a couple of times in a battle. Therefore, it is necessary to give mages the opportunity to cast spells more often without spending a learning slot, and so that magic is much more effective than for a warrior. And so that a warrior doesn't have this ability.