を[機「き」]に => Use A as an opportunity N1
Time, Situation
を[契機「けいき」] => As a good opportunity A, (do) B N2
Information, Report
た[方「ほう」]がいい => It would be better to A N4
Can, Should, Must
より~の[方「ほう」]が~ => B is more C than A N4
Comparisons
[一方「いっぽう」]だ => Change A continues, A does not stop N2
Miscellaneous
ない[方「ほう」]がよい => It would be better to not A N4
Can, Should, Must
[一方「いっぽう」] => On one hand A, on the other, B; Although A, at the same time, B N2
Contrast,Surprise