I would chose physical power if it gave me the strength of a super saiyan. Good bye nuke, hello spirit bomb.
If it must be realistic then I would go with military might as well. Though I must say this. If you depend too much on one of those powers alone, then you are prone to absolute failure.
I believe Hitler, Stalin, Mussolini and Hirohito all failed as an Axis power because they were to dependent on certain things and didn't care about the people's best interest, just their personal goals. I would say human nature was stronger than all these leaders "strengths" here because unlike them the Americans and British stood upright and had an ideal goal that all the people could embrace and when that happens there is little to no secrecy or fear in the general public to stand for their freedoms and beliefs. Those that were in fear of their leaders were having to hide those feelings and it only took one spark of hope for them to unite and cause an uprising. "United we stand, divided we fall."
Sorry for the WWII history lecture, I suddenly felt compelled to share my feelings about this topic in that way. To me all of these things can be quite fearsome but the people may rise against you for using it in such a way and that's something none of those powers can truly accomplish in instilling fear and thats will power.