I'll write very briefly about the ideas for this map.
The first one, for SoD, is collecting liches. The second one, for TE, is collecting demons.
Start. There are 3 options: Castle, Tower, Dungeon. Castle is simpler and develops faster. Tower has a slow start, but the shooters can be very strong in the arena. Dungeon has a good location, and you need to be able to quickly capture Castle, Tower, and Swamp. There's a difficulty with Rampart, which is very necessary because of the Treasury!
You need to play the entire map hiring a minimum — only angels in the Dungeons, leading the game with angels from the Griffin Conservatories. Then, by the end of the game, the income exceeds 1,000,000!!!
Hero selection: Naturally, warriors, because of the Red Sphere. BUT there are interesting possibilities besides the traditional Crag Hack, Tazar, etc.
Here, the main stacks can be liches — that means Moandor as well! Demons — Marius. I also tried out Orrin, since there's a possibility to collect the Armor of the Damned, which breaks through the Red Sphere! Thus, an army of about 100 Titans, 600-800 Sharpshooters, 200-300 Zealots, Eyes, Medusas, Archmagi, and Archangels. Very effective against demons.
In a few days, I'll finish the arenas, and everything will be clear.