ふしがある => Seem N2
Speculation
に気がつく => to notice; to realize N4
さすがに => understandably N2
Base, base
気味 => -like; -looking; -looked; tending to ~ N2
...ような気がする => have a feeling that; feels like; seems like; think that ~ N3
Description
さすがの...も => even ~also N2
The highest (comparative) level
さすが => as one would expect N2
Evaluate
たかが...ぐらいで => Just because... otherwise..., it's just... that's all N1
Evaluate
すぐ => Right now N5
Short period of time
ふと => suddenly; accidentally; unexpectedly; unintentionally ~ N3
〜がさいご(が最後) => if you do... negative result N1
Decisive (resolute decision)
いまさらながら => Still ... now N3
Time