てさしあげる => Do for N4
Give and take advice
ふしがある => Seem N2
Speculation
てさしあげる => to do something for somebody N4
Respectful, humble
あえて => dare to N2
Suggestion
とあって => because of N1
させてあげる => (Allow) N4
Allow
にあたり/にあたって => at the time; on the occasion of ~ N2
…ばあいもある => there are cases… N3
Ability
~あえて      => dare to; daringly; deliberately; purposely ~ N1
さあ => well N3
Suggestion
あるいは~あるいは~ => or, either N3
Line up, list
でもあり, でもある => is also... N2
Proportional, parallel