を[機「き」]に => Use A as an opportunity N1
Time, Situation
[要「よう」]するに => A. In short/put simply, B N2
Adjectival, Descriptions
を[契機「けいき」] => As a good opportunity A, (do) B N2
Information, Report
[必要「ひつよう」]はない => It is not necessary for A to be done N2
Needs, Requirements