From: Near Portland, OR
I only play the AI, so it's a bit different environment from playing PBEM, but I've had the Enterprise survive on many occasions. She even fought a battle of Midway type battle around Rabaul one time.
The three Yorktowns happened to be crossing the Coral Sea on their way to the DEI when a large Japanese force including most of the KB came down from Truk. All three Yorktowns were diverted to just south of Rabaul and weather was on my side. The first two days of the battle the weather south of Rabaul was too poor for much in the way of carrier ops and Rabaul took a heavy beating, but I had several air groups their. They didn't do much damage to the KB, but chewed up the Zeros to some extent and the KB expended a lot of air missions against Rabaul. Because of the bad weather the Japanese couldn't get a strike to find the US carriers.
On the third day, the weather cleared and the USN found the KB first. I think the Shokaku was badly damaged, but the Hiryu, Soryu, and Kaga were sunk (the Akagi had been lost to LBA a couple of months before). The Hornet was badly damaged by torpedoes and had to sit at Rabaul for a while until it was safe to move and then had a very slow 3 knot voyage back to the US. The Yorktown and Enterprise got through it with little damage and eventually joined the Essexes. Rabaul was a mess for a while and I had to completely rebuild some LBA air units that were essentially gutted.
It was some of the most exciting three turns I've ever played of the game.
WitP AE - Test team lead, programmer