Perhaps we could provide more detailed information about the skill tree in the reference guide? Is it even worthwhile? If there are any correlations between the probabilities of skill drops, how can we describe all of this? Yesterday, I read a post on a forum that claimed that Das and Lorelei in the Dungeon faction have a high probability of getting the Diplomacy skill. I tested it a bit, and it was confirmed for Lorelei; I noticed that it often appears after Scouting reaches the Advanced level. I also observed this with heroes from other factions (Diplomacy after Scouting reaches level 2). I decided to test other random skills, but I didn't have enough time. For example, Gem seems to often get Logistics as a bonus for having a weak initial skill (First Aid).