Awakening of Evil

Recently, I played through the campaign with a hero and used a 4-turn strategy. I would eliminate Furies in battles for the Town portal, but I would keep the scouts, upgrade them in the Hunting Lodge, and immediately head to the upper right Elven town, capture it, and when the strongest Elf approached, I would teleport through the Library to the beginning of the map and go to the lower Castle, while using the Trapper to lure the Elf into the Dungeon. As a result, I also captured the central Castle, gathered a couple of reinforcements from 2 Castles, upgraded the weaker Elves, and by the 2nd month, I had upgraded the strongest one as well. I leveled up Chaos, Sorcery, and Earth magic, focusing on archers and the Druid skill tree, and before facing Faidean, I only mentored Darkness – on the 3rd week of the 4th month, I defeated him without much difficulty. The mission isn't particularly difficult; the main thing is to play the beginning correctly and use the Town portal from the Library effectively.
P.S. I would really like to know which version of the campaign the respected Rambo was playing. My result on the latest version is 735 days, and I find it hard to imagine improving it by 100 days. Perhaps it's possible in the old version, without the changes to missions 1, 3, and 5...