さすがに => understandably N2
Base, base
さらに => furthermore; again; more and more ~ N3
Add
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
させて[頂「いただ」]きます/させてもらいます => Allow me to A N1
Miscellaneous
さすがの...も => even ~also N2
The highest (comparative) level
さすが => as one would expect N2
Evaluate
いまさらのように => Now... again... N2
Time
すら/ですら => even ~ (with emphasis) N1
にする => にする N4
さえ/にさえ/でさえ => Even N3
Not only, Not even
すら,ですら => Even A N1
(Not)only , (Not) even
~仮に...とすれば / としたら / とする => ~If..., suppose... N1
Condition (hypothetical condition)