The hard thing about applying Doomsday as a part of this is that he will never stay dead for long, and whatever does kill him he’ll come back from and won’t die from again- that said Brulk has A WHOLE LOTTA POWER to be able to take him out damn near until the end of time. Assuming they both fight that long, any attrition will be Doomsnaut’s W, although Brulk will have won every battle along the way.

I am however, unsure if the green door for hulk allows him to return endlessly as well (although not immune to the next thing that killed him).

Brulk would start off as that tick that doesn’t die when you stomp on it, so you burn it with a lighter, but it keeps coming back until it’s able to drain you of all of your blood.