…くらいの…しか…ない => Only… at low level N2
Limit, limit
... としての... => ...as a... N3
Position, perspective
(の) なら~しろ => If..., do something... N3
Condition (hypothetical condition)
[際「さい」]して/に([際「さい」]し)/に[際「さい」]しての => At the time of A (which starts now).. N2
Time, Situation
~のは…ぐらいのものだ => only (emphasis) N1
Limit
~にしのびない (~に忍びない)      => cannot bring oneself (to do); unable to bear ~ N1
~しいしい => Every once in a while... (Repeat situation) N1
Repetition, habit
のに対して => towards; against; regarding; in contrast with ~ N2
どころのはなしではない => this is not the time/occasion for N2
Base, base
くらいの => Approximate~ N3
Emphasis on degree
いつかの ... => Previously N4
Time
…の…ないの => thinking whether or not to do something... N2
Position, perspective