So the choose wisely part, "spoilers" was based on the top and bottom rooms in that zone, if you look at both the answer will become clear. The random rooms are on purpose to fit the chaos theme and to feel like the end is never the end etc. You just have to clear 7 rooms through killing all the enemies or by doing a puzzle like that one mentioned (wish I had time to add more however). If you die then that is minus 1 room progress basically. And so on the 7 rooms being complete you end up at the end room!