めったにない => Rarely N3
Degree. Level, Amount
に[先立「さきだ」]って/に[先立「さきだ」]ち/に[先立「さきだ」]つ => Before A occurs/takes place N2
Time, Situation
さえ/にさえ/でさえ => Even N3
Not only, Not even
にわたって/にわたり => Over the course of A (continuous action), Throughout A N2
Time, Situation
に[沿「そ」]って/に[沿「そ」]い/に[沿「そ」]う/に[沿「そ」]った => Along with A; In line with A N2
Based, Focused, Depending on
にあたって/にあたり => At the time of A (which starts now).., on the occasion of A N2
Time, Situation
にいたって => As for A, when it comes to the example A N1
Considering/ Concerning
[際「さい」]して/に([際「さい」]し)/に[際「さい」]しての => At the time of A (which starts now).. N2
Time, Situation
ところだった => About to… N3
Will, Decision, Doing
たが[最後「さいご」] => Once A occurs, B happens N1
Information, Report
したがって => Because of A, B N2
Reason, Result, Response
させて[頂「いただ」]きます/させてもらいます => Allow me to A N1
Miscellaneous