Good feedback. I have info and a question. First - the amount of XP that drops is tied to the number of Guardians that spawn. The Skeletons' purpose is not to drop XP but to give you a chance to maximize the number of Guardians that spawn per map... and it can vary wildly depending upon how the party coordinates.

My question is: how many Guardians would you estimate that you are spawning on a given run?
Thanks!