i dont think champion is very smart, i dont think doomsday would use idiotc fighting methos like he, when supes tries to outsmart him using speed blitz and flying since doomsday cant fly doomsday evolved to deal wtih it, when supes tried to toss him away he also used his body to land where he wanted, and when he first met superman he evolved to be stronger or as strong as him, he'd fight thanos then get stronger then him, if thanos tried mental attacks he'd just evolve beyond it like he did with manchester black guy on par with martial manhunter, the guy even goes immune to magic when blood fist or whatever his name was tried hitting him with a fist full of death souls it didnt even budge him, today he's immune to blasts that would incenorate superman he'd eventually take thanos down less thanos traped him but he's been traped before has he not