See, this is why I advocate against it online, and also learning some of the really crazy prophecy t-spin setups as well as back to back TST setups. The fact is that you can only ever use them against people online if you're already leagues ahead of them in terms of skill. You can only ever use it against players who you could just as easily beat with straight Tetrises and TSD's. I don't see why you'd voluntarily put yourself at the extra risk of misdropping, screwing things up and losing when you could just go for the safer and more straightforward route. I only ever use them when showing off in matches against friends or people who claim to be really good at Tetris DS.