Heat is your friend for this job,
Just a question though, Did you have the hub knuckle on or off the car at the time?
With the knuckle on the ground held between the knees, also only using 750mm breaker bar (one hand forcing the socket into the bolt and the other levering the bar. With heat applied a bolt at a time (rapidlycoolingwith wd40) , you will find they aren't actually that tight.
70nm and 180°