Agrail should receive a level equal to Railag's (minus N based on the difficulty) - most likely, it was just an oversight (a bug).
The Crown of Leadership in the Dungeon is located near the blue guard (the key is given by Lelliana, after the fanatics, I think).
Almost all battles without losses - well done! Although after 11 battles +330 charisma - the game becomes much easier.
900 Phoenixes - where did they multiply so much? (clearly an exaggeration)
I watched the replay - I would never have guessed to fight almost an entire legion of undead!
It's clear about the Phoenixes - they prolonged the game too much - you definitely won't be able to kill Arnie.

Not almost, but all... It was the desire for battles without losses that made my Walkthrough so engaging. The Phoenixes that multiplied are the ones guarding the armor of the forgotten hero, and the map is otherwise clear... Yes, the game was prolonged; it was around the 12th month. There was also a total lack of spells... from the light, there was only Divine Might. N based on the difficulty? I played on Hero difficulty... I reached the Crown of Leadership, but it's impossible to pick it up; I repeat, the map is clear.
I fought many battles with the fanatics to achieve the result... the ballistae were annoying; luckily, I found 17 Resurrecting Archangels in the Book of Light... But again, there are few spells on the map, considering that the Castle cannot be captured...

Well, if I had at least reached Arnie, the artifacts would have been great...

And also, before Railag transforms, a message appears stating that the loyalty of the steeds has increased by 100%