@Danny The Deer Tribe has chances at big powerful nature spirits as well as Wer-deer tribes men and such, The amazons are mostly just the Amazon units but they also have percent chances at hiring some more powerful units as well. I did specify that these are mostly just the revised minor classes (The classes meant to let you play with units that you normally wouldn't have available) Like when you pick the deer tribe its similar to the deer tribe villages that appear on the map as neutrals.

Either way the base unit rosters of some of these classes are sparse but they all have at least percent chances of more powerful units showing up. They are designed to not really be equal to the main classes though for the most part. (I will admit a couple of exceptions to that rule though)

There's not a lot of effort for some of these classes like a tribal the deer tribe and the Amazons there's any no custom units in there and they're not really unique some of the units are too expensive to survive all by yourself.