As far as competence of outer social situations, I'd say Tyler Durden has it NAILED. I haven't seen any of his RSD stuff other than trailers, but from what I've seen and heard from David Deangelo's stuff, the guy has been through thousands of situations and it shows. David likens him to a "old battle-trained warrior", as he averages about four nights a week in which he goes out to work on social interactions.
Also, Tyler's AMOG Tactics paper (which is free, search the internet) that he posted on mASF is amazing. It's the dickest thing ever, but it really works. I've used it in the past before I ever read it, although I've had it done textbook to me. I ended up getting cockblocked from a guaranteed lay, and the other guy probably ended up going home with the girl and her "girlfriends." (Real girlfriends wouldn't let her pass up a great guy like me

)
My own cocky humor aside, David Deangelo is really a great life coach. His material has helped me to transform my outlook of life, giving me a strong sense of inner power and true belief that I can do ANYTHING I want to, for real.
I wouldn't bother with taking Mystery seriously, and Ross Jeffries, I'm not sure if that stuff really works as well as they say, as well as not knowing how to correctly implement it "naturally" (without thinking) without coming off as manipulative, which has happened every time I tried any NLP commands in words, probably because I was thinking instead of just doing, but it's not my style anyway.
Mystery's attraction stages are spot on however. Anything that relies on canned material though is utter trash unless you're an absolute beginner. When I first became aware of this scene I started using Mystery's Method, mixed with my own routines, etc, and got good success at "attracting" women, although I never actually slept with any of them. MM will probably help you more if you're not good looking, not to be arrogant or anything. But if you're a good looking guy you can be in A3 (she qualifies to you, you send IOIs) immediately a lot of times I've noticed before you even say, "Hi." It's an accurate way to look at how sexual relationships start and proceed.
Never forget that it's integrating this stuff and making your own style that is what counts. Tyler talks of meeting so many people who try and hold themselves just like him. It took me a good year to figure this out. It's all about being yourself.