Guys tend to get all tangled up in the concept of a "killer pickup line". They obsess about the latest technique or gimmick, and while they are busy focusing on this weak area of "game", they completely miss the most powerful tool in the box.
Nothing is more attractive to a woman than confidence. Take two guys into the field, one armed with great chat-up lines and the other with unshakable self-confidence, and I know which one will be the winner every day of the week.
If you have confidence not only with women but also in all the other areas of your life, you are a powerful alpha male who doesn't need any silly gimmicks or routines to attract women.