Damn, I totally forgot that I haven't finished it yet...

Brief summary - I don't remember exactly how or where, but I cleared everything up to the 200 Death Knights... the army is quite wild, but even with it, I'm having some slight difficulty breaking through those 200 DKs... my army looks like this: a rusty, a magic, 2 reds, 6 bone, 24 axes, 20 SK, 6 angels, 1 green in the stash, as well as an archmage, and 6 wyverns.

I swept all the gold and resources; zero problems with the green drake, cleared the hive - ended up with 6 wyverns, carefully tore out all the axe-dwellings, and bought as many as I could, then took some potions while constantly buying more axes. Then I killed 3 reds and bought 1. With all this power, I went for the cons; ate them with a small loss of one-unit meat (mainly from events - trophies, fairies, goblins, sold something at the booth, left something for the Dragon Utopia), got 6 angels. Went to grind experience. Ground it everywhere... cleared all the spots and external dwellings for exp... even on the Alley of Light, I couldn't resist the stacks of crosses.
Became powerful :) balanced things out and stocked up before the utopias, figured out which one was weaker and crushed it, got some cash. Bought back my troops, crushed the second one, where all the meat had already fallen... spent all the money buying SKs, bought more bone ones. Went for the magic and rusty ones - took them down without losses. Bought them.
Took on all 3 Dragon Utopia, no problem, because the rusties have only 1 turn and the first cast accordingly, got another 40k gold
Reminder: this was all on the first day - I set unlimited turns, otherwise it's a pain. Sometimes I lacked mana. And I fought mostly with one-unit meat... I replenished mana only from events/quests for it.

Now I have 40k gold and can skip a week - buy more SKs, axes, bone ones, and reds; by my estimates, it should be enough, though I could sacrifice another 6 utopias for gold and goblins.
Basically, there's enough for everything, but it's better not to buy the magic drake, that way you'll have money, you can even buy 1 rusty... well, utopias play a big role in this specific game start... and without unlimited turns, you simply choose who you need for buying... you can do it like this - a wagonload of black knights, a dragon or archmage, and some fodder to clear responses - and that's how you kill 200 DK

But the main thing, which in my opinion isn't quite cool, is the ability to get both the dragon and the archmage... we save on the dragon as I already said - take 1 grey, kill the black drake, and come out with a dragon.
And to get the mage back - buy a gremlin at the quest hut and then exchange him for a mage near the city, after which you upgrade to an archmage.
That's how it is...