Which point is known to invigorate blood, regulate qi, and alleviate pain?

The point that is known to invigorate blood, regulate qi, and alleviate pain is SP-12 (chongmen). This point, located in the groin area, has effects that make it significant in treating various conditions related to stagnation in the body.

SP-12 is particularly important because it is associated with the spleen's role in fluid metabolism and its ability to facilitate the transformation and transportation of qi and blood. By invigorating blood circulation and regulating qi, this point can help break through stagnation or blockages that may be contributing to pain.

While the other points mentioned have their own therapeutic benefits, they do not have the same combined functions of invigorating blood, regulating qi, and alleviating general pain as effectively as SP-12 does. Each point has specific indications and uses within the context of Traditional Chinese Medicine, tailored to different ailments, but SP-12 stands out for its abilities in the context of this question.