[全「まった」]く~ない => Not A (at all; even a little bit) N3
Not only, Not even
[頂「いただ」]く => Received N4
Give and take advice
めったにない => Rarely N3
Degree. Level, Amount
ところだった => About to… N3
Will, Decision, Doing
て[頂「いただ」]く => Do for N4
Give and take advice
したがって => Because of A, B N2
Reason, Result, Response
といったらない/といったらありはしない => Extremely A, Very A, A beyond description N1
Degree/ Level/Amount
にわたって/にわたり => Over the course of A (continuous action), Throughout A N2
Time, Situation
たあげく => After A, B was the final/end result N2
Reason, Result, Response
といえば/というと/といったら => N3
Considering, Concerning
にあたって/にあたり => At the time of A (which starts now).., on the occasion of A N2
Time, Situation
にいたって => As for A, when it comes to the example A N1
Considering/ Concerning