Question about the add-ons.

Basically, I tried everything: just Heroes, Whirlwinds of War, The Loom of Fate... But I kept running into the same problem. I would download a new scenario, check which expansion it was intended for, then enable the corresponding expansion and launch the game. This continued until I found a unique version of Heroes of Might and Magic 4 - The Last Battle, which includes all the units, buildings, and artifacts from the expansions. I also found new campaigns from the "Chariots of the Gods," "Death Era," and another series. Could you tell me if "Chariots of the Gods" is also an expansion or just 6 campaigns? And also, what can "The Last Battle" be considered?