[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
(さ)せてほしい => Please let me do N3
Allow
てさしあげる => Do for N4
Give and take advice
てさしあげる => to do something for somebody N4
Respectful, humble
いささか => a bit N3
Evaluate
さ => -ness N4
さえ/にさえ/でさえ => Even N3
Not only, Not even
さあ => well N3
Suggestion
をして…させる => to make somebody do something, to let somebody do something N2
Allow
さえ/でさえ => even; so much as; not even N3
~てもさしつかえない => can ~; it’s okay if ~ (indicates permission or compromise) N1
Concession
まさに…ようとしている(ところだ) => Right on time N2
Time