… がいい ... => ... I hope that ... N3
Expected
たいがい => in general N2
Repetition, habit
いちがいに…ない => Impossible... in general N2
Description
~ようが...まいが => whether or not; regardless N1
… とはいいながら => although, even though... N2
Invariant
…以外(いがい)に…ない => with the exception of; excepting ~ N4
Limit
...たいんですが => want N4
How to say the beginning
がないでもない => is not entirely impossible N2
Explain
〜がさいご(が最後) => if you do... negative result N1
Decisive (resolute decision)
て仕方がない/てしょうがない => can't help but; very; extremely ~ N2
…からいいが => never mind that, don't worry about that N1
Cause, reason
ほうがいい => had better; it'd be better to; should ~ N4