Heroes in order of first use: Hero 2 → Hero 1. Pieces that end up somewhere new: all 3 mirrors.
Hint 2
Start: push the right bottom-left mirror left, push the right bottom-left mirror up 3 tiles and push the left bottom-left mirror right 3 tiles.
Hint 3
Finish: push the bottom right mirror down 2 tiles, push the left bottom-left mirror down 3 tiles and push the left bottom-left mirror right 4 tiles, then head for the exit.
Hint 4
One move is Activate pressed during a fall, at the position shown in the step before it.