All good.
1. The author of "San Ming Tong Hui" is Wan Minying, a Jinshi of the Ming Dynasty. This book has a very high official status in the history of Han traditional numerology and is a masterpiece of eight-character numerology.
2. "Yuanhai Ziping" was compiled by Xu Dasheng in the Song Dynasty based on the fortune-telling results of Xu Ziping, his predecessor, Donghai. It is the ancestor of eight-character numerology and a classic that must be learned in eight-character fortune telling.
3. "San Ming Tong Hui" and "Yuan Hai Zi Ping" are both classic numerology works, and there is no one better.