For my shop work, mostly repair and maintenance on my own 3 cars, I invested a whopping $40.00 or so for 2 WalMart cheapo floor jacks. To raise the rear of my 380SE, and my Mazda 929 (which BTW has the same rear end setup, bushings, subframe and all), I position the jack pads under the rear subframe bushings, and position each jack stand under the adjacent subframe arm. I let the weight down on the stands and leave the jacks in raised in place. I found that the differential is too awkward to use when trying to pump up the floorjack.

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1986 560SL
2002 Toyota Camry
1993 Lexus