always have heal and ignite just to get last hit if timed right

follow this order to the letter and u shall have a powerful assassin also include black cleaver as an optional item just to one hit minions

the only problem with this build is that it starts squishy but is the beast of hell in later game

these are the runes i recommend but if u want to change some runes for health let me know how that works out and even i will try it

start cross jungle/top at lvl3 or 4 as u will increase the amount of gold recieved late game u can even solo the dragon and get the baron down to half health