Since the latest update, mini-bosses spawn rates have improved dramatically. I have seen 5 mini-bosses over the last 2 days, out in the frontier. I found 3 momentus (one at FNM ) and 2 marlixes so far. So when I was building a little project in the frontier, I randomly find mini-bosses that appear. This morning I didn't realize there was a momentus behind me and he pulled me in, killing me. I think we should add the messages, you sense an eerie presence, or the ground shakes nearby, every time you log back on, when you are near the mini-boss. It would make it easier to stay alive and be alerted, instead of having a heart-attack. I don't think the ps settings affect this, cause I was on difficulty 5.