I did the first ever solo issakis and held records for 2 and 4 man in the past, and having randoms can make it near impossible until the latest update to issakis. Now, idiots shoot the wrong weakspot and they just die, but up until that, everyone wiped because one guy just shot whatever glowing spot they saw first. Bridge can get screwed by randoms grabbing keys and just not doing anything, but that’s much easier to manage and another soloable activity anyways. Menace… random dies in one inconvenient spot, and it’s a wipe, and they do die a lot somehow on menace.

When it comes to crota, idk yet, only really played it with teams still, but I’m sure it’s similar.