I incubate all of my eggs manually. This way I can get mom cleaned up and back on food immediately rather than wait the extra 60 days. Whether I decide to breed her or not the following year, I feel that the sooner I get nutrition into her body the better off she will be long term.
Ball python eggs are not as hardy as bearded dragon eggs and even if you let your females maternally incubate their eggs, you still have to "tweak" your environment to ensure maximum success.
-adam