Not DzjeeAr's best.

As Zax said, it is best to put guardposts next to lava to prevent unwanted assaults from the two other Keepers. Opening yourself the first time will attract the attention of lvl 1 fairies and flies, little annoyances at best. Then, you have all the time and gold you need to prepare to fight the enemy Keepers. First Blue, as you don't have access to bridges, then Green. Both of them are pushovers and they'll give you access to prisons, probably.

Once both are defeated, you can focus on the last hero fortress. However, you'll never have access to bridges, so invading it is impossible. The specials and spells inside will never be collected. I hope you'll have enough vampires, dragons and hornies to CTA inside, or be prepared to fight a lot in possession. 2 Avatars, some Samurais and Monks guard the area.

Once the Heart is destroyed, the last enemy party will spawn with 2 more Avatars and a God-Knight with many other heroes. Funny thing is, I couldn't find them and had to cheat to see they spawned in an empty space near Green's Dungeon, but since they have no tunneller they got stuck there.

2/5, probably more like 1.5/5

This map looks hard on first sight as there are two enemy Keeper and several Avatars on hero side. Enemy keeper can also attract Horned reapers and both enemy keepers have higher creature limit than you. so combined they have 3x more creatures than you. And they are allied, with heroes too. But you have pretty much all time you want before you decided to attack them. as parts of map are blocked by hero blocks they cannot claim and you can use lava with Guard posts to protect yourself. And you should as I had two Call to arms in my dungeon very fast and two horned reapers attacked me so its crucial to use Guard posts. You can have like 9 Mistresses so that should be enough to deal with anything if you use them smarty.