Heroes 6 - Discussion

I need help, otherwise Sandor will start appearing in my dreams.
I haven't been able to complete the 3rd mission for the Orcs for 5 days.
If anyone has completed it, please write HOW???
I meet all 7 veterans, and then they overwhelm me. I don't have enough of an army. The enemies are stronger.:confused:

This mission also seemed like one of the most difficult in the game to me. I managed to complete it on my first try, but it was challenging. Remember that the enemy kills the panthers first, then the centaurs. That is, at the beginning of the battle, apply reinforcement to the panthers. When you see their number approaching the initial amount, apply regeneration. Try to defend yourself within the castle. Harpies are very helpful while the enemy is attacking the gates; the harpies fly over and attack without any problems. If ranged attacks are not well developed, don't forget to place goblins in the tower.