Originally posted by Nibedicus
Where he felt like the only way to stop DD was to kill him
I don't think he was trying to kill him (that's against his rules), only beat him like Justice Lord Superman did. I don't think he was particularly pushed to his limit either (cut lip, few rough patches). Sure Doomsday was pounding the crap out of him (so has many other characters), but it's just the first part of the fight until he turns on "serious mode" and gives back some physical punishment.
Originally posted by Nibedicus
and to sacrifice himself in the process.
Can't agree with that at all.
If you are talking about the lava, most of their fight they were bathing in it. Watch the start, Superman was at one point submerged yet unaffected in the least (another major durability feat I don't think Hulk can match). You are probably referring to Diana rescuing him, either she just wanted to get him out of there anyway, or she was unsure of the extent of his durability.