Danny can take Piotr solo. While Danny may not hit quite as hard as WWH, he hits more than hard enough to ko a class 100 character. His punch is much more focused, concentrated, and precise than Hulk's. That should give a ko. And if his punch can break through Colossus's skin, a very likely possibility, then he can kill Piotr. Spidey can add alot and could solo if BFR or immobiliztion were allowed as wins. Luke is irrelevant.
Jake Shields is definitely underrated. Check him in Abu Dhabi.