Check out the tourney thread. I don't MTT, but I'm pretty sure your strategy won't work too well. You're playing nitty, so you're not in many hands. When you do get a hand, you won't get action, so it's hard to build a stack.

The way you're playing now is more suited for donkish cash games, where players don't pay much attention to VP$P/PFR%, etc.

Don't get me wrong...pre-flop hand selection is the first skill you need to develop. But you also need to be positionally aware, and know the difference in value with JTs UTG vs on the button. If you only play premium hands, you become LOL easy to read.