Excellent guide. I want to add an experience to it. This happened to me on the 25 axe kills. I had 19 done on my own in Giant's Husk. I was going to the next area to find either a quarantine or do an Archon's Forge fight. But on the way, someone was near me with their axe and killed the remaining six and I got credit to bring me to 25. So either I glitched, or you just need to be near someone doing the axe. Because I wasn't even attacking the enemies; I was just near the guy. Anyone else have this?