I second this complaint as there are many things that clearly affect score but are not mentioned. Decreasing skill points for example score badly as they don’t count as damage but does make a few troops far worse at scoring. Barrier keeps your guys alive, but will hurt you score wise as a barrier hit still counts as damage. It is also obvious that transform counts as “killing a troop” so even when you win if a few transforms occurred like with dragons eye, well your score was also transformed quite negatively.
Frankly the system has been mostly figured out on the grief side and if this formula has so many weights, I highly doubt that same score scenarios would be a problem. I mean, that was a supposed reason for this change back in the day. However, that is also now untrue as in sigil events, having the same score on the leaderboard yields the same reward currently.
A great deal of troops are either useless or unusable due to the scoring method. The scoring method is unclear about other methods such as lethal damage or destroy so those seem quite fine. While this is kept secret, most of the better teams for offense and defense are known almost making any additional details obsolete except for essentially biased scoring against a good selection of troops.
At this point, I don’t think even they know how it works with the constant bugs and sudden gameplay “adjustments” to fix a delve “problem”.