It is often generated for treasure locations, either with a large number of Pandora boxes containing troops or with experience or money.
Therefore, for objects on starting respawn points (not treasure locations) and the treasure locations themselves, I made a breakdown....
Based on the first opened chest in a treasure location, you can already understand (70-80%) what will be in the rest. If it contained units, then the overwhelming majority of Pandora boxes will contain units, and these will be characteristic of the specific landscape (lava - means Inferno troops).
I'll try to guess and estimate that the first Pandora box in the treasure location contained units, then:
1) a good set of units
2) a set of units (unknown level)
3) a set of units (normal level)
4) units
5) experience
6) experience
7) experience (5K)
8) units
9) 20K experience
10) units
8mm
Now it's just a guess)))