Oh man! Double Darkseid would SO get owned by Gog. They were getting slammed by the legion. And they are many. Darkseid can be overwhelmed by sheer numbers, but I believe that Gog can physically overpower both Darkseids. The Legion would be a nuisance to Gog, so he would merely take them out of the equation. I mean the math is plain.
Gog=5
Darkseid x2=2
5>2