Whatever strategy helps you win. TAG and LAG are by far the most effective. But really it comes down to how you play. I have a LAGgy playing style, so I typically play really loose. I will jump to TAG if need be though. There are so many different aspects to look at that there is no one hundred percent answer. If everyone is playing the same style, then it comes down to cards. If everyone is trying to outplay everyone, then it only comes down to the cards. If you want to know what strategy will be best, look at your opponents. That will tell you what you need to do.