ばこそ => only because ~ N1
からこそ/~ばこそ/こそ => precisely because ~ N2
~かとおもえば...も => no sooner than N1
Compare
ばこそ => Because of A N1
Reason, Result, Response
…とばかりおもっていた => Thought that ... N3
Speculation
...ことをとおして => through; via; throughout; by ~ N2
Go through, go through
~これ以上...ば => if ~ any more than this N1
Condition (hypothetical condition)
~にはおよばない => there is no need to; unnecessary; no match for ~ N1
Necessity, obligation
ところによると / よれば => According to.. N3
Base, base
お => Prefix N5
Respectful, humble
…ば…ところだ(った) => If… (counterfactual condition), then would be ~ N3
Condition (condition contrary to reality)
には[及「およ」]ばない => There is no need to A N1
Need/Requirements