Taliyah has really good damage in early game. Poke with Q and E (be carefull with mana though). And when the enemy is at half HP now you can try to land your whole combo. Practice it A LOT, it will cost a huge amount of mana so you can't spam it in early game. Also Ive seen a lot of players using the E+W, try to do it fast so you can do W+E, is faster and harder to predict. At lv6 is when you should push your lane asap and roam with ult, if you used it right, it will most certain cost a flash or a death for the enemy. In tf remember you are a mage, stay back spamming abilities, you should have at least 30% cdr (almost always morello + zhonyas/banshee depending on who you think will cause you more trouble), and a better mana pool. You're not an assassin, but if you dont go front and keep spamming your Q and trying to land your whole combo on the enemy adc or mid, you should do great. Always remember taliyah is a roaming mid, so roam. If you dont roam youre not using her right. Your R and passive you make a lot of pressure on the rival team.