No gems. No anti-life equation. Takes place in a empty New York. To death or ko. No holding back. Doomsdays version is before he killed superman. Apocalypse has 3 hours prep and 3 of mandarins rings and Hal Jordan's ring. Please provide reason for your answer.
Team 1 has a massive advantage.
Although if we look at the last 5 years from Darkseid history its easier to make a case for Thanos being able to beat him. If however we go further back to Darkseid Fourth World Omnibus or Legend days, Thanos is going to have his hands full with Darkseid alone, and Thanos is the biggest powerhouse in team 2.
Doomsday is a bit tricky, if we include any incarnation after Death of Superman and before his current resurrection in Action comics 899 (that would includes versions his story arcs like Hunter/Prey, Doomsday Wars and Our World At War, commonly referred to as Imperix Saga), these version are just too powerful for Thanos to deal with in a random encounter. Given the fact that these version of Doomsday have had little problem ripping right through the justice league , beating Darkseid and havent been defeated either via BFR or in hands of uber-powerful beings like Imperix, i really dont think Thanos can take him, let alone anyone else from Team 2.
Mongul while the weakest link from Team 1, while would have problems KOing a properly writtten Apocalypse, has feats that shows he is just as strong, if not stronger than Colossusnaut.
Team 1 should win a solid majority, 8/10 or even 10/10 assuming its a powerful incarnation of Doomsday who could likely solo.
team 1 because of 3 reasons
3-Apo do not belong to this crowd.
Apo has 4 lantern rings and is the only one with prep, with that and without some jobber aura, he can deal with this crowd. Anyways, i think team 2 takes it. Darkseid is actually the biggest threat, but Thanos can at least deal with / damage him. I can see Colossusnaut beating this version of DD with a difficult fight. And Apo can defeat Mongul, i don't know how well four lantern rings will work, but a well written Apocalypse with 3 hours of prep shouldn't have too much difficulty with Mongul. Then Apo can help out whichever one of the other two needs it most, which will probably be Colossusnaut, then take out Darkseid as a team if Thanos hasn't already dealt with him. 7.5/10 for team 2.