Yes, Kralik has hit the nail on the head.
Borne Far Away can't trigger threats because the companion goes to the dead pile from hand. If it a card exchanged companions in play and the dead pile, then threat wounds
would be placed because a companion from play was going to the dead pile.
And ES's rulings are, to my knowledge, all correct: 1) threat wounds trigger from
SftF, before you have a chance to play cards gained from it, 2) Aragorn remains in play - you cannot play another copy of Aragorn, and if the one in play dies you will still not to be able to play another one, but the one in play is unaffected, and 3)
Legolas' Bow works for toil exertions.
Thranduil