Basics and strength.
As an example, suppose your goal is to make your back layout as clean and beautiful as possible. You don't accomplish this by spending a lot of time focusing on your back layout; you accomplish it by building a clean and beautiful handstand and lots of core strength, which then lets you build a clean and beautiful backhandspring and cartwheel, which then lets you build a clean and beautiful ROBHS, which give you the power you need for a clean and beautiful layout.
You build a clean and beautiful takeoff, and do a lot of clean and beautiful straight body drills of all sorts, and build rock-solid aerial awareness by making heavy use of visual cues.
Then you put it all together, and building a clean and beautiful layout becomes comparatively easy.
And this applies to all skills. If you want X-skill to be perfect, you don't spend all your time working X-skill; you spend your time breaking it down into components and making sure each of those components is perfect.
And when you take a lot of skills and break them down into their components, you find most of them use a lot of the same components. This is why we call them basics -- not because they're easy, per se, but because they form the basis of all the other skills.
If you want high scores across the board, make sure your candlestick, forward and backward rolls, handstands, hollow holds, and arch holds are absolutely perfect, and then once you get them absolutely perfect, keep practicing them anyway.
