~をたて(~を経て)      => through; after; via N1
~たると ... たるとをとわず => regardless of; irrespective of; no matter~ N1
Simultaneously
[頂「いただ」]く => Received N4
Give and take advice
て[頂「いただ」]く => Do for N4
Give and take advice
くなかった => Past negative of A-い N5
Conjugate verbs
ていただく => to have someone do something (humble) N4
Benefit
ていただく => to have someone do something (Instruction) N4
Benefit
~ばよかった/~たらよかった/~ばよかったのに/~たらよかったのに => If only N3
ただし/ただ => right; correct. N2
~にかたくない      => easy to do; it's not hard to ~ N1
を[頼「たよ」]りに => With the help of A; thanks to A N2
Based, Focused, Depending on
のを忘れた => to forget; to leave carelessly; to be forgetful of; to forget about N4