Best Way to Use My Points to South America

Hi OzB, I posted this on another forum but hoping to get more response/ideas here.

I am Based in Perth and currently planning a short (2 weeks) trip to South America later on this year. Most probably to Brazil because there are direct flights (via Doha) and J availability with Qatar. I plan to burn my Avios for GRU-DOH-PER, so that's one-way sorted. Now I just have to figure out what's the best way to get there, apart from PER-DOH-GRU (as it will have to be Y all the way). I currently have 160k Velocity, 121k Krisflyer, and 120k QFF (prefer to leave the QFF alone though as I am saving for OW award ticket in the future). Main priority will be: 1) utilizing all my Velocity and KF, 2) the shortest route POSSIBLE, and then 3) the pricing. Of course, I'd rather fly in J but if it means much less stopover/shorter duration, I'm prepared to do in Y :D

I am open to all ideas, including paid Y tickets. So go ahead, hit me with ideas LOL.

Thank you ;)