[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
いかんにかかわらず,いかんによらず => Regardless of A (A is a reason, response, result) N1
Based/focused/depending on
[極「きわ」]み/[極「きわ」]まりない => Extremely A N1
Degree/ Level/Amount
てもかまわない => No problem N4
Can, Should, Must
というより => Rather than A N3
Comparison, Exchange
てかなわない => A is a problem N2
Adjectival, Descriptions
わけにはいかない => Must not A, Must A N3
Needs, Requirement
といわず => Not just A, not just B, but N1
(Not)only , (Not) even
と[言「い」]わせれば => On the view of N1
Based/focused/depending on
わ => Very, so, already N5
Particles
ない[方「ほう」]がよい => It would be better to not A N4
Can, Should, Must