はさておき => setting aside ~ N2
Trend
における => in; at (place) N2
Scope
お…くださる => Please do ~ (honorific) N3
Respectful, humble
させておく => Leave it alone, don't interfere N2
Position, perspective
おまけに => A. In addition, B N2
(Not)only, (Not) even
まさか...とはおもわなかった => never thought that N3
Surprised
はさておき => A aside; putting A aside, B (new topic) N1
Miscellaneous
おまけに => to make matters worse; besides; what's more; in addition; on top of that​ N2
いささか => a bit N3
Evaluate
お => Prefix N5
Respectful, humble
さすが (に) … だけあって => being the case; precisely because; as expected from ~ N3
Base, base
させていただけませんか => Could you please let me do... N4