So El Piloto...
If I understand you, Avianca (El Salvador) does not hire anyone who is not a citizen of El Salvador, correct? What if I am a Salvadorian citizen (born), but also a US citizen? Last I check El Salvador does recognize dual citizenship.
If your answer is correct... "If it's Avianca, I think the same minimums apply.. 250tt IR, and CMEL..." then...
-A dual citizenship, TT250, IR, CMEL, etc. means Avianca "will hire you" as an FO for either the E190 or even a A320? or something for the right seat. Is this correct?