Level 255 without boosters help?

Some levels cannot be passed for many attempts without boosters. Try to always play the starting boosters on your first attempt for legendary and nightmarishly hard levels. With both win streak and starting boosters you stand a better chance at passing on your first try. If you do fail then do not waste any more boosters but retry the level time and time again until the game lets you pass or if you have some gold bars until it offers you enough extra moves to pass with 10 gold bars. If you have no gold bars left as early as level 255 you might like to consider deleting the app and reloading it, start a fresh game from the start and save your gold bars until you get at least to level 200.