2 wheel chocks correctly placed on the grounded wheels.
2 axle stands on the side jacking points, then release the jack off the front/rear jacking point until it's lightly touching but the weight remains on the axle stands.
Then if both axle stands implode to death, then at least you have the hydraulic jack as your backup.
2 axle stands on the side jacking points, then release the jack off the front/rear jacking point until it's lightly touching but the weight remains on the axle stands.
Then if both axle stands implode to death, then at least you have the hydraulic jack as your backup.