This thread is retarded. Thanos has almost every possible advantage in this fight, except maybe strength and we dont even know where doomsday strength is at so I'm going to say that they are even.
Not saying that Thanos is as powerful as imperex prime but he could pull a repeat of what imperex did to doomsday and blast him to the bones.
The question of this debate is does doomsday have any kind of on panel showings of him busting through shields that held back the champion (who was at the time MUCH stronger than doomsday) or taking attacks from galactus.
The next thing is what is the most powerful blast that doomsday has taken because I would love to see some kind of on panel proof of him even standing to an planet destroying blast.
Thanos wins this every damn time, doomsday is so far under him. Thanos isnt darkseid.