The only advice I can give to anyone who is playing this on Legendary by themselves...
...make sure to destroy the hunters during that mission with Jun, because it is f**king possible for them to throw Jun off the cliff, and you don't want to spend the rest of the segment (after killing hunters) trying to beat it yourself, I spend an hour trying to beat the small bit just before the end of the mission, it is insanely annoyingly difficult.