I am trying to translate basic combat to Japanese, but find myself struggling as to which form of "x of this" to use. I am currently trying to figure out how to say "single," as in "single punch," with the following ones:
単(たん)-OR- 一重(ひとえ)-OR- 単一(たんいつ)
What is the rule of choosing between the (kunyomi number) + 重 and other forms?