One strategy for Angry Birds Bad Piggies level 22-2 is to fling the Boomerang bird over the main structure, spinning it back into the TNT. The explosion and pebbles should clear the right half of the level, except for maybe the hanging piglet. If needed, fire a Yellow bird through the balloons and into that pesky piglet. Finish with another Yellow bird low into the bottom of the left structure, clearing the remaining pigs. The score in the video below is 98,440.
Minimum 3-star Score: In the original release (v3.0.0), the 3-star minimum was set at 97,900. Rovio has stated that this was a mistake, and in a the v3.1.0 update, the threshold has been dropped to 97,000-even.