Most of the mission is pretty straight forward. If you struggle to find your way, just press
to see where you need to go.
But lets face it, the only part we need help with is the boss at the end.
After spending an hour trying to beat this guy (on my Legendary run) I came across this perfect little trick to beating him with ease.
Ended up getting it on my second attempt following this video.
Credit to 3xTiNcT for the video.