One strategy for Angry Birds Red’s Mighty Feathers level 24-9 is to send the first Red bird below the blue balloon and into the stone structure. All lower pigs should be popped by the blast. Now arc the next Red bird over the red balloon and redirect it into the TNT at the base of the tower. Note that this shot can be done first, but such 1-bird clears do not often yield 3 stars. The score in the video below is 86,300.
If you have a different strategy for completing this level feel free to leave a comment below.