いまさらながら => Still ... now N3
Time
いまさらのように => Now... again... N2
Time
さすがの...も => even ~also N2
The highest (comparative) level
まさか...とはおもわなかった => never thought that N3
Surprised
(の) なら~がいい => if; in the case that ..., you should... N3
Invite and advise
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
とは[裏腹「うらはら」] => Contrary to A, opposite of A, ... N1
Contrast/Surprise
ながらに,ながらの,ながらにして => While A, during the condition A, Since A (point in time) N1
Time, Situation
させて[頂「いただ」]きます/させてもらいます => Allow me to A N1
Miscellaneous
はさておき => setting aside ~ N2
Trend
お~願います => please do (A) N2
いまさら ... ところで => Now even if... no matter what... N2
Time