Encounters are balanced with a certain ilevel in mind. They go well a player will have x amount of health and we want to hit for %age so much so it'll hit you for y amount. The difficulty of Coil 'part two' will probably not be tuned for less than ilevel 90 since they might think, or know from server data, that most wont be full 90 (yet) so when people enter in 90 they might find it much easier. SE should be careful with how high they make ilevels because when gear scales so high getting one price will at some point in time nerf it considerably.