以来 => since; henceforth ~ N2
て[以来「いらい」] => After A, B (continuous action/condition N2
Information, Report
… となったら => If... N2
Condition (hypothetical condition)
いったん~ば/と/たら   => Once you do something N2
Necessity, obligation
ときたら => when it comes to; concerning ~ N1
~ときたら => when it comes to; concerning ~ N1
Story topic
… たら => Introduction N4
How to say the beginning
~仮に...とすれば / としたら / とする => ~If..., suppose... N1
Condition (hypothetical condition)
といえば/というと/といったら => N3
Considering, Concerning
かと思ったら/かと思うと => just when; no sooner than ~ N2
~たらんとする      => want to become, worthy of ~ N1
…かと思ったら => just when; no sooner than ~ N2
Things do not match the prediction