I stand by my earlier post:
"I supported the outboard end of the control arm with a jack. Then I (in this order) removed the wheel carrier/control arm bolt, the sway bar bolt and the shock bolt from the control arm. I then lowered the control arm with the jack and removed the spring".

I would add that you should use a roller type jack so that it will follow, relative to the ground, the arc movement (toward the ground and toward the centerline of the car as it pivots on the inner bushing, all at the same time) of the end of the lower control arm.

I think the biggest challenge is breaking the control arm/wheel carrier bolt, it is tough to get a socket or wrench in to un-torque without removing or bending the brake disk shield

I will say, in agreement to Bruno300TE that the use of a compressor for the rear comlicates the matter. One qualifier though, if the intent is to remove the rear subframe without taking apart the suspension, the tool may be appropriate.