[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
てさしあげる => Do for N4
Give and take advice
らしい => Seem to~ N4
Sentence Endings
さえ/にさえ/でさえ => Even N3
Not only, Not even
もしも~なら => If A... N3
Conditional, While
にしたら => From A's perspective, N2
Considering, Concerning
もし~たなら => If A … N3
Conditional, While
させて[頂「いただ」]きます/させてもらいます => Allow me to A N1
Miscellaneous
さしあげる => Give B to A (A is a third party, not yourself) N4
Give and take advice
さて => So N2
Miscellaneous
としたら => If A were the case; Supposing A N3
Conditional, While
でも[差「さ」]し[支「つか」]えない => It's OK if A, it doesn't matter if A N1
Need/Requirements