Where and when?
Hell's Kitchen, New York. 10pm and they begin at the opposite end of a block. The streets are deserted but plenty of items (parked vehicles, lamp posts, bus stops and such) remain. The entire area is on limits. This includes the streets, rooftops, alleyways, buildings and sewer.
This is New 52 Mr. Freeze. He has his basic gun and one freeze bomb. Feats from Batman Annual 1 and Red Hood and the Outlaws 9 are applicable. Daredevil has his standard gear. This is a random encounter, however, Daredevil knows the basics of Mr. Freeze's powers and Freeze knows nothing about Daredevil. All standard elimination methods apply.