に関わらず/に関わりなく => in spite of; regardless of ~ N2
に関して => about; regarding; related to ~ N3
に関わって => to relate to; to have to do with; relating to ~ N2
[関「かん」]して => About A, With relation to A N3
Considering, Concerning
にする => にする N4
一緒に => together N5
否定形 => Negative form N5
Conjugate verbs
~ことにする      => to decide on N4
Decision
ことにする => to decide on N4
Determined, determined
~仮に...とすれば / としたら / とする => ~If..., suppose... N1
Condition (hypothetical condition)
ことにする => Decide to N4
Causative, Passive, Volitional
一度に => all at once N3