You make a good point, I did use the words wrong. I interpreted “cold” in the sense of opposite of angry or emotional (because I looked up synonyms of the word and it came up with things like “dispassionate” and “unemotional”). And regarding the word calculating, I was considering clarifying about how Vader and Anakin are both very good military strategists, but I thought I had gone on long enough. I’ll edit my post to remove the misuse of the words.

I also am aware that Vader was absolutely winning against Luke the whole time, but he was still holding back (which means that he had full control the whole time). If he actually was fighting at full strength the whole time he would’ve killed him. But he was absolutely winning nontheless. That’s something I love about the scene and the duel.