I thought this would be a pretty good scenario.
Lobo (who can make an army based on his blood)
vs
Gog(who can travel to previous historical moments and make his own army)
meh i dont know gog can kill supes with one blast and also transmute matter i believe so he can turn lobo into stone like darkseid did that clone of lobo slobo but im not sure who would win
kingdom gog is above ganthet and highfather, and phantom stranger, and shazam as well as DC zues in power not all of them combined but if he fought them one on one each he'd beat them each down, if its kingdom gog he'd probably kill lobo, and doomsday evolved to where gog couldnt hurt him id think thats why he did what he did.
The Gog from the gogs wars was able to create a whole army of himself to fight Superman and Doomsday by going back in time at different intervals.
Lobo now has the ability that whenever he starts to bleed, an army of Lobo clones form from the blood with the power of lobo.
The problem with Lobo is he is not meant to be taken seriously. In one moment, he beats the entire JLA combined and in the next he has trouble with Superman alone.