This strategy requires a massive amount of luck! Send Leia up and over the first structure, using her tractor beam on the far side down to the right. The stone should take out the pigs below and the Probe Droid. With luck the blaster cannon should take out the far right structure and pigs. We have a better strategy in this level.
Timing is key. Wait for the laser blaster finishes shooting 3 lasers. Send Leia above the first pile. She'll bounce upper because of the laser blast. Use her tractor beam to pull the pile of iron blocks (in the left side of the level.) She'll fly to the rightmost side of the level and push the rightmost tower to fall to destroy the snow under the glass block which support the large tower. This tower will unstable and fall down. Popping all pigs.
See Video Walkthrough.