When I changed my oil pump for my cam swap, I very slowly and carefully jacked the engine/transmission up using two jacks. I used a floor jack with a 2x6 on the oil pan and a scissor jack with another 2x6 on the trans pan. I jacked up each a little bit at a time to minimize stress.
When I tried to jack up the engine just using the bell housing area, it felt like there was a bit too much stress in that area. By using the two jacks, it is slower but you cut the stress in half in any one area.
Also, if you can get the engine about 1 1/2 to 2 inches off of the mounts, this will allow the oil pan to come out very easily. When I did mine, I kept the engine up by putting a DOD lifter under each engine mount and while I was able to get the pan off, it was a bit tight.
2009 G8 GT