いまさらながら => Still ... now N3
Time
[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
さえ...たら => Just...is enough N3
Conditions (sufficient conditions)
させてください/させてもらえますか/させてもらえませんか => please let me do N3
さらに => furthermore; again; more and more ~ N3
Add
(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
しかしながら => however, nevertheless N2
Things do not match the prediction
~たらさいご => If you do… negative result N1
Situation, case
いまさらのように => Now... again... N2
Time
...し, ...し, ...から => and; and what's more ~ (emphasis) N4
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