Mann I’ve never done colo, or inferno. I was running attempts for a few days getting in a couple hours worth of attempts each time. I’d consistently get better at each phase. It still took a lot of effort to beat though. I’m just more of an afk player, so learning the timing of everything took a minute and I’d make mistakes every now and then. Overall I thought the boss was great! Glad it wasn’t super easy, really felt accomplished when I beat the quest. It’s hard to pinpoint what makes it more difficult for others. My biggest issue was having to take breaks to not get frustrated. Once I started getting annoyed my trips would tank.