We're just talking about our thing... about TE. I have to admit that playing the second quest in SoD is much more profitable.
Good job, you understand!!!
Now I see that Natasha didn't make a mistake inviting you to the clan!
Actually, my post contains both a hint and a joke at the same time.
The joke is that you need very little money for the upgrade. After all, it's enough to upgrade a stack or stacks so that there are no free stacks or un-upgraded stacks of liches in the army. (although I just had a thought, does the same number of upgraded and regular liches appear after the battle? Oh, damn - I don't know!)
The hint: with such a map size, the number of monsters, the presence of this artifact, and a powerful computer, the right idea comes to mind on its own. Now you just need to compare the costs of obtaining the necessary artifact + the time spent going around all the monsters, with a slight neglect of the main development and rapid development in the remaining short time; and the costs of gradual, high-quality, slow, but stable development with methodical and skillful exploration of only "necessary" locations.
And, of course, you need to analyze the exit point. On the one hand, there is a very tempting corner where you can detach yourself from the "world" and gather a solid army. On the other hand, there is a very tasty artifact. On the third hand, there is another idea.
So, damn it, you have to think, rack your brains, where it's better.... :)
Ugh, I've confused everyone's brains :)