I don't want details I just want the mission names that cause the point of no return? I want to suspend my MQ playthrough just before that point. At the moment i'm at peace with all 4 factions

Mass Fusion is one of the missions with a point of no return. Usually, any quest that will change your alignment with any faction will give you a warning though. It will tell you, if you do this, you will become the enemy of x-faction. Or it will give you an option to talk to another faction about it.