So if I understand correctly, there are three major differences that make this easier than in the base version: - You don't have to start your base from scratch. - Possessing enemy workers gives you access to their tech tree (this is usually disabled, I wonder if it's an oversight or if it's a deliberate change). - A patch made Reanimate Dead units immune to being dispelled.
I used that technique on kael thas dungeon campaign to destroy orc bases. I sent 8 invisible turtles and surrounded the Fortress, then I looked for peons. I attacked the base from other direction with 2-3 archers, and when all army went to that side I destroyed castle, and ate all peons, and fled. But only some turtles survived, that's why I sent my army from the front to kill any remaining peons. 😂 Now they cannot make new buildings.
And I used 2 sorceress to close portal. I made illidan stand on circle of power. Then I made him invisible. Then I made one of the sorceress invisible and m ade them wait at a distance. After 45 seconds I again casted Invisibility on Illidan. No demon was able to touch illidan except infernal's fire. 😂