[必要「ひつよう」]はない => It is not necessary for A to be done N2
Needs, Requirements
にひきかえ => In contrast to A N1
Comparison/ Exchange
もしも~なら => If A... N3
Conditional, While
もらう => Received N4
Give and take advice
もう => Already done N5
Miscellaneous
もし~としても => Even if A... (chances of A are pretty low) N3
Not only, Not even
てしまう => Did something N4
Secondary Verb
てもらう => Do for N4
Give and take advice
もし~たなら => If A … N3
Conditional, While
まだしも => A is acceptable, N2
Comparison, Exchange
だろうと[思「おも」]う => I think probably A N4
Sentence Endings
ようと[思「おも」]う => I think I will A N4
Causative, Passive, Volitional