Helpful article about archetype shapes: https://riptidelab.com/forum/threads/archetype-shapes.2022/
A classic for everyone to read: https://articles.starcitygames.com/articles/whos-the-beatdown/
Article about player agency:
Part 1 https://cubecobra.com/content/article/6090e6e2a92ae8104cffc78f
Part 2 https://cubecobra.com/content/article/609dcaf8028ce9104b067ac3
Manabase analysis that explains how much fixing you should include: https://luckypaper.co/articles/how-many-lands-should-you-include-in-your-cube/
These are also fun to look at: https://cubecobra.com/content/article/189f944f-f996-4658-8313-c467412ec8e4#cubelet
A little inspiration to get your gears turning: https://cubecobra.com/content/article/174289f1-8511-43f3-90b9-9b3cfb6505f6