合う => do something together N3
が必要 => need; necessary N4
結局 => after all; eventually; in the end ~ N3
その結果 => as a result of; after ~ N3
必要がある => Need/Need to N4
~こと請け合い => I guarantee ... N1
Happens next
[合「あ」]う => To do A together/mutually N4
Secondary Verb
場合(は) => in the event of; in the case that ~ N4
~ににあわず (に似合わず ) => ~Different from N1
Evaluate
その[結果「けっか」] => Because of A (in the past), B N3
Reason, Result, Response
[要「よう」]するに => A. In short/put simply, B N2
Adjectival, Descriptions
要するに => in short; in a word; to sum up; to put it simply ~ N2