Discussion of level 8 monsters.

Thank you!

So, is he the strongest (or at least one of the strongest)?

According to the stats, he's the second strongest. It would also be helpful to include a screenshot of his abilities. Or, better yet, download the 3.58f update from the Heroes 3 website and see for yourself. He's sure to please even "fans" of the Dungeon faction, if only because he's not much weaker, but he's also cheaper, saving you the cost of, say, two Phoenixes. With their help, he can easily defeat a powerful Dungeon faction hero without any blocking.