I am trying to position 3 kingdoms and one monster horde at the four corners of a map for a quest, while positioning your palace in the center. The map is 1024x1024, and the quest is called "Majesty Wars" (#WAR)

Most of the positionings are not just North, South, East, West, Northwest, Southwest, Southeast, Northeast... many of them are positioned in a specific manner in accordance to each other, with certain distances/closenesses to each other, to make the entire cities work out.

Also, is there a mod that allows you to build enemy buildings such as Dark Castle, Witch King's Tower, etc?

The quest goes like this:

"Majesty, I have news reaching from the four corners of your kingdom that three other kingdoms (as well as a monster encampment) want you dead and your kingdom handed to them on a silver platter. If we are to survive this incursion, we must gather all forces available and do battle with those nasty rulers. This won't be an easy fight."

Objectives: Destroy the four kingdoms and reclaim your rights to the land.
Conditions of Failure: All of your outposts are destroyed.
Restrictions: Due to overpopulation, you are unable to build anything and everything, except Guardhouses, Balista Towers (As long as you have the dwarven settlement), Wizard's Towers, and Statues. Also, due to a bad enviroment, peasants will not move in so easily, thus, Broken Sewer Mains, Sewer Entrances, and Houses will not appear automatically in your kingdom.

Starting Gold: 50000
Special Perks: Your heroes start out at a high level. You already have 4 paladins, 4 warriors, and 4 discordians recruited when the game starts, each at level 10.

Here's the layout of the kingdom:

Central Corridor (Revealed): 1 Level 3 Palace (Center), 1 Level 3 Marketplace (SW of the Palace), 1 Level 3 Magic Bazaar (N of Marketplace), 1 Level 3 Blacksmith (SSE of Marketplace), 1 Inn (NE of Blacksmith), 1 Level 2 Library (NNE of Magic Bazaar), 1 Hall of Champions (NE of Library), 1 Royal Gardens (N of Inn), 1 Fairgrounds (NNW of Royal Gardens, SWW of Hall of Champions), 19 Level 2 Guardhouses distributed equally all around the entire Economical District. 3 Warrior's Guilds with Discordians in the West Guild, Warriors in the central guild, Paladins in the East guild (all full and all heroes at level 10) (SW of the Marketplace's Guardhouses), 1 Level 3 Temple to Dauros (SWW of the Eastern Warriors Guild), 1 Level 3 Temple to Fervus (empty, NW of the Western Warrior's Guild), 1 Level 3 Temple to Agrela (E of Temple to Dauros), 1 Level 3 Temple to Krypta (N of Temple to Fervus), 1 Level 2 Temple to Lunord (NEE of Temple to Agrella), 1 Level 2 Temple to Helia (NNE of Temple to Krypta), 1 Level 3 Sorceror's Abode (NE of Temple to Lunord), 1 Wizard's Guild (NE of Temple to Helia), 1 Elven Bungalow (NNE of Sorceror's Abode), 1 Dwarven Settlement (NEE of Wizard's Guild), 1 Embassy (N of Elven Bungalow), 1 Mausoleum (E of Dwarven Settlement), 1 Ranger's Guild (NNW of Embassy), 1 Level 2 Rogue's Guild (SEE of Mausoleum), 1 Temple to Krolm (NW of Ranger's Guild, SE of Rogues' Guild), 35 Ballista Towers surrounding the entire Recruitment Corridor, 2 Rows of 75 Houses and 3 Gnome Hovels surrounding the entire city.

Central Corridor Layout Pictures
https://drive.google.com/open?id=1icSSOZ9c4qHWTjXb0yZ2BLYrLuBsQKvI

North-Side Corridor (Hidden): 1 Outpost (Far North-Central), 1 Trading Post (SW of the Outpost), 1 Inn (SE of the Outpost), 6 Ballista Towers surrounding the site, 1 Level 2 Guardhouse (Between the Trading Post and Inn, to the South)

Northern Corridor Layout Picture:
https://drive.google.com/open?id=1rxoSwnvk5dBn2fHwFEyhYjTEGhAXNUwN

South-Side Corridor (Hidden): 1 Outpost (Far South-Central), 1 Trading Post (NE of the Outpost), 1 Inn (NW of the Outpost), 6 Ballista Towers surrounding the site, 1 Level 2 Guardhouse (Between the Trading Post and Inn, to the North)

Southern Corridor Layout Picture:
https://drive.google.com/open?id=1rGT_d7nRZv_6a2du8D48fywG6mgImYgo

East-Side Corridor (Hidden): 1 Outpost (Far Central-East), 1 Trading Post (SW of the Outpost), 1 Inn (NW of the Outpost), 6 Ballista Towers surrounding the site, 1 Level 2 Guardhouse (Between the Trading Post and Inn, to the West)

Eastern Corridor Layout Picture:
https://drive.google.com/open?id=18CGzsnLTaRf2BxSgVxGD_BpvK1M49ojT

West-Side Corridor (Hidden): 1 Outpost (Far Central-West), 1 Trading Post (NE of the Outpost), 1 Inn (NE of the Outpost), 6 Ballista Towers surrounding the site, 1 Level 2 Guardhouse (Between the Trading Post and Inn, to the East)

Western Corridor Layout Picture:
https://drive.google.com/open?id=1mfk7Zx33tphkuq0ThuFdR5inWBBfCixz

Northeast Corridor (Hidden): 1 Level 3 Palace (Far Northeast), 2 Level 2 Rogue's Guilds (S of the Palace), 2 Ranger's Guilds (West of the Palace), 1 Level 3 Marketplace with everything researched (SW of the Palace) 3 Elven Bungalows (W, SW, and S of the Marketplace), 4 Level 3 Temples to Fervus (two W and SW of the Western Ranger's Guild, two S and SW of the Southern Rogue's Guild), 1 Fairgrounds serving ranged contests (SW of the Southwestern Elven Bungalow), 2 Inns (SW of the Fairgrounds), 1 Trading Post with potions researched (SW of the two Inns), 1 Elven Lounge (NW of the Northwestern Inn), 1 Gambling Hall (SE of the Southeastern Inn, 23 Houses spread diagonally SW of all the above buildings), 15 Level 2 Guardhouses with arrows and veteran guards lined diagonally in front of the entire city. City natively starts with 25000 Gold.

Northeast Corridor Layout Pictures:
https://drive.google.com/open?id=1Df2dca-AgvFu8UiH2AKsLqStoTD-GTIy

Northwest Corridor (Hidden): Palace Level 3 (Far Northwest), 4 Level 3 Wizard's Guilds (S and E of the Palace), 1 Level 2 Library with everything researched (SE of the palace), 2 Level 3 Temples to Agrela (S and E of the Library), 1 Level 3 Magic Bazaar with everything researched (SE of the Library), 2 Level 3 Temples to Krypta (SW and NE of the Magic Bazaar), 3 Gnome Hovels (1 Far SW, 1 Far NE, and 1 SE of the Magic Bazaar), 2 Level 2 Temples to Helia (1 SW of the Southwestern Gnome Hovel, 1 NE of the Northeastern Gnome Hovel), 2 Level 2 Temples to Lunord (1 SSE of the Southwestern Gnome Hovel, 1 SSW of the Northwestern Gnome Hovel), 2 Royal Gardens (1 S of the Southwestern Temple to Helia, 1 East of the Northeastern Temple to Helia), 1 Fairgrounds serving magic contests (SE of the Central Gnome Hovel), 20 Houses spread diagonally SE of all above buildings, 15 Guardhoses with arrows and veteran guards lined diagonally in front of the entire city. City natively starts with 25000 Gold.

Northwest Corridor Layout Pictures:
https://drive.google.com/open?id=169SnaddbzrwmfeR-MqKqtaUjB7rQ3C8M

Southwest Corridor (Hidden): Palace Level 3 (Far Southwest), 4 Warrior's Guilds (N and E of the Palace), 1 Level 3 Blacksmith with everything researched (NE of the Palace), 2 Level 3 Temples to Dauros (1 N of the Blacksmith, 1 E of the Blacksmith), 3 Temples to Krolm (1 N of the Northwestern Temple to Dauros, 1 E of the Southeastern Temple to Dauros, 1 NE of the Blacksmith), 2 Dwarven Settlements (1 North of the Northern-Most Warrior's Guild, 1 East of the Eastern-Most Warrior's Guild), 2 Gazebos (1 N and 1 E of the Central Temple To Krolm), 1 Fairgrounds serving melee contests (NE of the Central Temple to Krolm), 18 ghouses spread diagonally NE of all above buildings, 15 Level 2 Guardhouses with arrows and veteran guards lined diagonally in front of the entire city. City natively starts with 25000 gold.

Southwest Corridor Layout Pictures:
https://drive.google.com/open?id=1YHf08Sj6bo7TLCE5JefORsP7pRU282PU

Southeast Corridor (Hidden): Dark Palace (Far Southeast), Witch Towers, Liche Queen Lairs, Fortesses of Ixmil, Spires of Death, Achaic Tombs,
Brashnard's Spheres, Ancient Barrows, Dark Castles, Evil Castles, Abandoned Castles, Ancient Castles, Ruined Keeps, Ruined Altars, Ruined Shrines, Goblin Hovels, Goblin Watchtowers, Goblin Encampments, Goblin Fortesses, Rat's Nests, Broken Sewer Mains, Sewer Entrances, Dragon's Lairs, Ice Caves.

Southeast Corridor Layout Pictures:
Since I cannot simply build all the enemy buildings and position them, there is currently no Layout Picture for the Southeast Corridor.