I compared four drafting systems:
The Bunka Style Missy Block: Something between voodoo and magic because it only requires two measurements: centre back and bust. It gives a loose-fitting boxy bodice that works very well on my body.

Metric Pattern Cutting for Women’s Wear by Winifred Aldrich: Slightly hard to follow, as it the instructions end with just one large shoulder dart. I didn’t sew up this bodice.

Suzy Furrer’s system which is extremely well-reviewed on YouTube. I bought her book during Covid. Unfortunately, I had to abandon this draft as it was too complicated for me.

Finally, something from Xian Ping, which seems to be a hybrid of the Japanese and French systems, which gave me the most fitted block so far. I made two versions of this.