Examples of how to conduct complex battles (detailed turn by turn). Everyone must read this!

I have a question for the esteemed Gunnar. In the maximum-level dungeon of Tazar, level 9, he faces a couple of wyverns, a couple of dozen archers, a couple of flies, and five gnolls. Sorry, but this is an army from day 4-5 of the first week. Where does the level 9 come from? Of course, Tazar is a beast by this time, but in practice, with such an army, the hero in the dungeon will be at most level 3-4, and not Tazar. And he will be defeated. And a level 9 Tazar, say, in the 2nd week, should have a corresponding army, otherwise how did he level up? Sorry for the bluntness, but thank you for the information. Respect.