Our strategy for Big Setup level 11-6 is to loft the Boomerang bird over the main structure, spinning it back into the stone block on the far side. Use both Big Brothers to blast through the hollow stone squares in the bottom-left corner, inevitably blasting the structure to pieces. The score in the video below is 104,710.
If you have a different strategy feel free to leave a comment below; however, don't just post your score via the comments, as that's what the leaderboards are for.

Used two birds. The second bird hit a sweet spot on the right corner of the hnorizontal wood plank and the top of the hollow block. Went right through to the bottom pig to obtained the present score. Gained 7k+ in score.
Used three birds and scored 109k.
Heehe once again I got a ove avg using @wrw01s famous sweet spot!! It’s a wonderful thing to watch everything crash and piggies pop!! Thanks @wrw01 add another to the tab!! ;)
@kimmiecv Hey kimmiecv just line them up and they will go down smooth and cold…glad to see you beat my score, that means much to me because the advice is repeatable and works for someone else. Also provides hope that my eye hand coordination has to improve.
2 birds as well. Did the same as the video for the 1st bird, then threw Terrence and he hit just the right spot on that horizontal wood plank and caused an unstoppable chain reaction to get me 106,070.
I was shocked to get 116k… I hadn’t seen the walkthrough until I started writing this comment, but I arrived at exactly the same strategy independently (it is admittedly pretty obvious, and they’re very easy shots to repeat again and again). The boomerang bird hitting the stone block almost completely wiped out the right-hand part of the structure for nearly 31k. Terence hit the sweet spot at the top corner of the hollow stone blocks and passed straight through the top pair, and the resulting collapse fell just right and annihilated almost the entire level. Only a few stray blocks and helmets remained.