Here are my builds CURRENTLY on mobafire

Akali: http://www.mobafire.com/league-of-legends/build/akali-you-were-trying-to-kill-who-2139
Katarina (AD): http://www.mobafire.com/league-of-legends/build/katarina-attack-damage-style-1188
Katarina (AP// which rapes AD btw): http://www.mobafire.com/league-of-legends/build/katarina-shunpo-that-705
Tristana: http://www.mobafire.com/league-of-legends/build/tristana-dorans-blade-massacre-1185
Kennen: http://www.mobafire.com/league-of-legends/build/kennen-ad-as-modified-1260
Kog' Maw: http://www.mobafire.com/league-of-legends/build/kog-maw-mouth-of-the-void-5177
Kayle: http://www.mobafire.com/league-of-legends/build/kayle-the-judicator-1686
Kassadin: http://www.mobafire.com/league-of-legends/build/kassadin-the-void-walker-2788
Master Yi: http://www.mobafire.com/league-of-legends/build/master-yi-the-true-hybrid-8415
Ezreal (AD): http://www.mobafire.com/league-of-legends/build/heat-ad-ezreal-comeback-build-11403

Enjoy
this also gives you a good idea of which heroes i play >.<

- HeAt

you can use my pantheon build since i'm too lazy to make a mobafire account, just remember to throw on the red pots and have the manamune become switchable for the occult