ことにする => Decide to N4
Causative, Passive, Volitional
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
すら,ですら => Even A N1
(Not)only , (Not) even
の[末「すえ」]/た[末「すえ」] => conclusion N2
Reason, Result, Response
くする/にする => To make, to change into N5
Change, cause and effect
んです => Because, by… N4
Situations and Experiences
ところを/ところに/ところへ => At time/situation A N2
Information, Report
からすると => Considering A... N2
Considering, Concerning
すると => A. Right after, B N2
Time, Situation
ずにはすまない/ないではすまない => A must be done N1
Potential, Possibility