It is necessary to refine the mechanics of invisibility
First, when the enemy uses invisibility, this stupid inscription "Invisibility" is displayed on it, after which it becomes invisible, but this inscription reveals his position, following him over his head, and as a result we see where the enemy has moved. As a result, it is very easy to knock it out of invisibility by any ability in area. It is necessary to remove this inscription so that the player does not know where the enemy moved after using invisibility. Or to make so that the inscription does not move behind the invisible enemy.
Second - when the player uses invisibility - enemy characters do not take any measures, they just do not do anything. It is necessary that the opponents tried to dislodge the player from the invisibility by spells in the area, trying to strike roughly where the player was using invisibility. Also, if the player is unaware, the computer has not managed to dislodge the player from the invisibility by the ability of the area, and there are no more enemy targets for the computer, then he must start using abilities that restore health, armor and magic armor and various strengthening spells.