I have done this both ways, (a: pulling engine with trans, and b: dropping trans) and it is really about the same amount of work either way. You need an engine hoist or crane to pull the motor and trans. To drop the trans by itself, you can use an engine support fixture or engine hanger. You can buy either tool for about $200; but the hoist is more versatile.
Here is the link for dropping the trans:
You do not need special tools to remove the subframe half. I'm not so sure about your driveaxle removal method. I did not need to remove calipers or rotors to do mine.
I am in the middle of working up the description for pulling engine and trans together (drive train is out, working on the engine now) will finish the procedure when I have completed the installation.
I have completed a writeup on drive axle removal and have the "remove" part drafted for the drive train R&R. If you want those, let me know, I can PM them to you.