First of all you don't have enough health so, it will be easy for someone to slain your hero.I prefer to put on a Yummomu's Spirit than a Trinity Force.Also the Nija Tabi is for evading you should use, Breseker's Greaves for more attack speed.Another thing is tha Last Whisper it is ok but, i think a Phantom Dancer would be better it is faster and it gives, you critical hits.The Bloodthirster is perfect and the Infinity Edge.Now about the runes, Put on more ability power, cooldowns and critical hits only tanks use healyh runes :/.By the way it is ok for the first time have fun with your games ;).