"The Art of Strategy"

I didn't want to clutter the reports, so I'm writing here:

in such a game, there were "not few" of them, but there were none at all. It's not interesting to play when one player has everything, and the other has nothing.

1. Please explain what "everything" and "nothing" mean? I'm not an expert in the fifth game, but based on the principle of the third game, I understand what the situation is when there are no decent main heroes, no hidden spots, no banks of money/resources/monsters... just freebies on the respawn points... cool artifacts...
In this map, resources and money are not a problem; free monsters/hidden spots are distributed quite normally... money banks and resource banks are also not a problem to find, especially on adjacent respawn points.
Artifacts on the home territory and nearby usually drop at a simple level - you can't really count on relics... and as for the starting hero, I don't know which one it was, but Ingvar looks quite good as a main hero....
2. For the Elven ability "Sworn Enemies," you need to kill a certain number of corresponding monsters. Does it count if you defeat a mixed army in one battle, for example, 20 shamans, 50 latniks, 50 wind dancers, and 40 golems?
Can any of them be chosen as a sworn enemy? ... or does it only matter what form this unit was in on the respawn point (for example, shamans)?