Multi-prong approach.
I have wedged some big trees. A bottle jack, if you don't have a real tree jack is a whole lotta 'go over there" with plenty of tight wedges. I've only jacked big trees with Silvey jacks.
He called for more rope force which went from whole lotta (insufficient) pull to zero when it broke.
2 more (good rope-angle) ropes on two more machines would have also been a good way.
5 long wedges can do a lotta lifting.
10, twice as much.
How much backweight does it seem to have had?