If you want to use this build, you should first know that your advantage is largest range in whole game. Remember that when you shooting from bushes, you have 2 stack on passive. So if you prefer top or bot with mate, try to shoot from them. If you go mid, farm to level 6 and start ganking with your ulti.

Remember that traps can save your live ! When running away from enemy place trap front of you. You can always have chance to trap him and imbolize for 1,5 sec that gives you enough time to save your positive score ^ ^ Or 90 Caliber Net to slow enemy and knock yourself back :)

I prefer Critical chance runes because they gives much bigger dmg on start from crits, but i gave also other options like Armor penetration for playing against tanks (ranked games when you see what had been took ) and critical dmg runes but they give you profits only in mid and late game...

Choose whatever you want :)

Core items are
Optionaly buyif you'r taking heavy dmg also you can slow target or/and
If you want higher crit chance then swap Last Whisper for another Phantom Dancer

Caitlyn is not jungling hero but she also can take down easyly creeps. Just stay in nearest bushes and shot creeps from them then you will slain them very quickly.

Don't EVER move alone ! Caitlyn is easy target when moving solo. you can always run away by usingbut it's hard anyway...