I got my propshaft out with the car supported as above - I could have done it with the car a little lower - but I wanted to remove the subframes too.
I am big with orang-utan type arms - if you are more average sized you could probably comfortably do the job with the car quite a bit lower.
...probably a good idea to have some more stands or something available to support the weight of the shaft as you undo the last bolts. If it hits you on the bonce it will hurt.
I have a collection of scrap 4x2 timber offcuts - very useful for this sort of thing.