A question I have pondered also
The last time I did it was by jacking up one side of the car placing some 2 inch thick blocks of wood under the wheel then goung around to the other side and doing the same. This I repeated 4 times until I had about 8 inches of blocks under the wheel. I then used the trolley jack with block under the front cross member jacking point raised the car and quickly placed the Axle stands under the sill jacking points.
This enabled me to then do the work safely and I also had the car on a level on both sides.
Very cumbersome and time consuming - there must be a better way.