Walkthrough for the "Tribes of the East" expansion.

Please help, I can't complete the last map in the mission for Arantir. I placed 4 heroes in the designated spots, but nothing happens. How do I perform the ritual to remove the barrier? I've done everything as instructed. I freed the hero from the dungeon. What am I forgetting? - I have a huge request here: please help me! I've been stuck for 3 days, I've cleared everything, captured all the mines, explored everything. I even found the word "SKILLED Necromancers" (which are supposed to stand in those 4 spots). I leveled each of them up to level 15, got the "Skilled Dark Magic" skill, and placed them all in the designated spots 10 times, and NOTHING happens!!! What should I do??? :smile35: If anyone has any ideas, please post them here as soon as possible. Or, if not, maybe someone could upload a save file from the moment they passed through those stupid gates?