Shortest fail combo for rarest dragon?

[doobert]

Does anyone have any data for the shortest fail time combo for a chance to breed rare dragons? Im sick if the 21+ hour fail times when i try for a rare. Has anyone out there figured out a short fail time combo for a high reward dragon?

[jdnarak]

I believe red x green has the shortest. There are 4 possible outcomes: 2 super rare, 1 rare, and 1 common. They are all 7 hrs or less. The common is 3 hrs.

[doobert]

I believe red x green has the shortest. There are 4 possible outcomes: 2 super rare, 1 rare, and 1 common. They are all 7 hrs or less. The common is 3 hrs.

Thank you :-)