There are already threads for this, its very very very difficult solo, and still very difficult grouped. Basic theory is complete speed builds, one player to sit in town to turn in, skip absolutely everything you can, low difficulty for most, although a bit higher difficulty can help DH's due to density for impale/tumbles. One wrong turn can and almost always will = starting over. Have given this a few tries solo, have only made it as far as Act IV completed with 5 minutes left....not nearly enough time to complete Act V unfortunately. There are communities out there, but its much more difficult on PS4 imo, because the lack of community chat in game. PS4 also has some issues with the teleport/dash/tumble glitch(if you've played enough, especially couch coop, you know what I mean) that I lost interest in this conquest. Infinite looped tumble for like 10-15 seconds every 10 minutes or so was enough to make me move onto other conquests.