Discussion of level 4 monsters.

Okay, let's go through this step by step:

1) To reach the enemy, you first need to defeat many neutral creatures. If you do this slowly and with losses, the battle with the opponent will turn into a mere formality. Therefore

Yes, large Dragon Golems, and maybe a stone will appear, and they will get stuck...

And they won't have time to, say, "cover" a ranged unit or a sorceress in time. Therefore, clearing the area with them is much more difficult than with titans.

I think such spells as "Bless" and especially "Cure" are only used against AI.

Very useful spells for clearing the area, especially healing. In Fortress, there are no questions - mass cancel, slow, hypnotize, disable, etc. But you need to survive until you reach Fortress, as I already wrote.

Sorceresses are recruited in outer dwellings, if there are any on the map.