After finally obtaining the light dagger, I felt the need to revise this guide because it is now RTA viable. The setup for skull skip requires you obtain a light dagger before level 10, however if you do it will save a minute or so of the run by being able to skip the skull fight. To perform the skip you will need to have Jump man Suit and Light Dagger equipped, jump up to the area with the thwomps, and make sure you have a rage leap prepped, jump forward, then jump again ideally your meter is below the screen at this point, then rage leap, jump and flutter forward, while trying to maintain your energy. If done well you should be able to get to the end of the level. WARNING: If done incorrectly you risk soft-locking the game, forcing you to restart the level.