てこそ => Now since A... N2
Reason, Result, Response
こととて => Because A N1
Reason, Result, Response
させて[頂「いただ」]きます/させてもらいます => Allow me to A N1
Miscellaneous
ことにする => Decide to N4
Causative, Passive, Volitional
を[込「こ」]めて => Put A into it N2
Will, Decision, “Doing”
に[答「こた」]えて => In response to A N2
Reason, Result, Response
ことになっている => Plan, rule, decide N2
Information, Report
こそすれ => B is definitely not so (strongly emphasized) N1
Contrast/Surprise
[少「すこ」]しも~ない => Not (even a little) A N3
Not only, Not even
たことにする => To do/act/pretend as if A N1
Will, Decision, Doing
さて => So N2
Miscellaneous
すら,ですら => Even A N1
(Not)only , (Not) even