In a legit game of course.
It's been a while so I can't remember perfectly, but in this one 2v2 hotseat game, I managed to get 3 Stronghold towns, and 3 Behemoth Lairs in the area or something like that. I remember I was producing 12 Ancient Behemoths at each Stronghold though, so soon enough I had 150+ Ancient Behemoths on my main hero (Malekith, very high level with nearly all spells). I was originally Dungeon, so I also had about 40-50 Black Dragons, and some other Dungeon units as well.
It was probably my most unstoppable army, and I would use mass Prayer to buff up my Behemoths, and if some died I would resurrect them. I had some good items too, but I can't remember too specifically what they were.