That said, we honestly don't know. Strange hasn't been Sorcerer Supreme for a while now. I think it's hard to determine a placement for him, since we know he's not at classic levels, but we don't have a definitive new placement for him.
However, if we must speculate (and it is just speculation) I'll take the guy whose lowest showing is losing to Vulcan. In the scheme of things, it's really not a bad resume he's built for himself in the past year.
Uhm... no
Cardinal had his own source of power, firstly. And, secondly, he stabbed Adam with hollow blade, not any energy construct. I am referring to that occasion when Gamora got all burned.
Also, Martyr stabbed him as well. That is on the same level as being stabbed by ninja, isn't it? With sneaking up on him etc.