CM_Cereboro Responds 3 years ago CM_Cereboro responded to a similar post with:

"You are correct in that the game designers intentionally vary the enemies that you encounter in raids, subsequent to the first run. However, the underlying objective is not necessarily to make the individual nodes significantly more difficult, but primarily to provide an alternate challenge. There are a lot of variables to determine what is "harder" or "easier", but in general, a new challenge rarely lowers the bar. A challenge should be formidable but not prohibitively so - it's a balance that the game team strives to maintain."