一体 => …the heck; …in the world; …on earth N3
~こととて      => because; since ~ N1
とうとう => Eventually, finally... N3
Completed
ときとして => sometimes... N2
Trend
と~と~どちら~か => Comparison N5
Compare
~としたことが => ~ surprised N1
Surprised
ともすると => Perhaps, maybe N3
Base, base
... るとか ... るとか => それとも... または N4
Demonstrate by example
~と(も)なると/と(も)なれば => ~Just, whenever, once N1
Condition (hypothetical condition)
ということ/というの => convert phrase into noun N3
~と      => with~ N5
Companion
~と      => and~ N5