I am very grateful that I was able to do it - indeed its one fo the high value points fo the BAEC program for me.
The loss of Latam would be tragic, both earning and redeeming, though earning its not that hard to have this plated on OW carrier flight numbers, IB and QF especially, for tier points, since so many flights are codeshared.
LATAM is currently in bankruptcy, who knows how they will emerge. So in short, yes this can be done ( avois bookings ) please do your homework.