Walkthroughs for custom maps.

Taking this opportunity, I want to ask about "Wayfarer": I saw a video where one player breaks through an antimagic garrison with 4 stacks of megadragons, each with 9999 units. But what impressed me most was the time: the 70th month! So, is this map really that long to complete, or did the guy just want to break through this garrison out of boredom, accumulating troops for several in-game years? Because, as I understand it, this garrison, like similar ones later on, is just there to "test" the player, and it doesn't need to be broken through.

Behind this garrison, there's a sign with the author's name and contact information:

I'm currently playing this map, and so far I like it, but I'm hoping for a reasonable completion time: I really don't like drawn-out stories. In general, how long did it take for those who completed it? If there was such data somewhere, I don't remember it now (I'll search the forum).

That guy on his Heroes 3 Combats channel started playing this map without any preparation, scouting in the editor, etc., and, to be honest, he was quite a novice. Therefore, he simply couldn't handle some battles in the early stages, accumulated an army, and broke through certain places on the map not through strategy, but through brute force. Plus, that guy ALWAYS COLLECTED ALL the key creatures from ALL the external lairs. And playing with 3 heroes is a waste of game time, both during the playthrough and in real life. Therefore, such a long time is a typical playthrough for an ordinary player without experience.
And breaking through the antimagic garrisons is a "side effect" of such a long playthrough, when enough strength has already been accumulated to break through these garrisons. It's impossible to break through them during a normal playthrough! There's even an event or inscription behind one of them in English from the authors, something like "Why are you cheating?" (meaning, why did you fly over the garrison for an artifact), i.e., the author didn't anticipate that anyone would break through them. Also, during that playthrough, he didn't often use save/load, i.e., he could travel around the map back and forth to check something without reloading, as is usually done when playing custom maps.
But a big plus of his playthrough is that you can see what and where awaits you, and where to find which secret, although not always.
Regarding the timing, I played this map 3 times: the first time blindly, in 12 months. The second time, already with skills and understanding, in 9 months. The third time, for speed. I managed to finish it in 6 months, 1 week, and 7 days. Although, now I see that it can be done even faster. So, a normal completion time is 6-9 months.
P.S. Yes, I forgot another important point. The main strength will come from events and various quests. So, in 6-9 months, the main army will come from the mentioned sources, and not from castles and dwellings. So, there's not much point in accumulating strength.