I think some of the sabotages are very bad. for example lights is really easy to fix fast because of it's location. comms is also really bad because everybody goes the the same places so if you kill in comms or office while people are fixing the sabotage it's pretty hard to run out of sight before someone goes to fix the area where the body is. the only good sabotages are o2 and reactor because it's really easy to run away from bottom hallway or o2 after you got a kill. and reactor is really good too because a lot of the time one player gets out of decontamination before the others that are trying to fix so if you're pretty fast you can vent kill them and vent away. the only reason reactor and o2 aren't so over powered is because they take a very long time to overload. but I think because lights is pretty bad on MIRA and because hallway sensors and the fact that it's split into three areas so it's easy to track who everyone was with, MIRA is the hardest map to be impostor on. (yes I know all the vents connect together but that's what makes hallway sensors so good)