I trained by myself. I consumed lots of material. I guess I would recommend the first 10 episodes of Pickup Podcast, Savoy's Magic Bullets (the title is ironic), and probably anything by Brad P. I'm not sure there's anything that is particularly thoughtful or scientifically serious while also being compact and immediately useful. Also, people are at different levels of functioning on different dimensions, so what will be most impactful for a particular person is hard to predict.

Alternatively, skip the pickup world and just do Toastmasters and then go to lots of parties and clubs and social gatherings and watch what people with high mating intelligence are doing.