Heart of the Night

Yes, the map is good, but I don't understand why the mage takes so long to sit in the paths. I killed everyone on Warrior difficulty in the forest, and it took 5 attacks to defeat the Necromancer with almost no losses. Where should the mage go? Why is the Guardian's brown gate not opening?

Added after 17 hours and 13 minutes
)))))))))) And what's the point of killing Baal with a mage if the mission fails?