flash + cleanse is what i use. i rarely die using leblanc, any CC gets shrugged off allowing me to escape with a 1,2, or a triple flash option. you could drop sorc boots to add merc treads instead to mesh with the cleanse's 3 seconds of 65% CC reduction...
depending on enemy team make up determines my first item. either mejai's or morello's. dont rush a DFG, so weak as a first item. if they have enough squishies ill rush mejai's and my first item of the game is amplifying tome so all i need is 1150 for boots and mejai's maybe a bit more for some health pots. im always having at least 3 heatlh pots.
you dont need deathcap at all. i run Mpen Marks, Flat AP quints, Mp5 seals, Flat AP glyphs.
masteries is 9/0/21.
other items are up to you, ill fit in a BV too.
early to mid game is easily yours unless they are smart enough to buy MR.
late game she sucks, she can still **** somebody up no doubt. but thats every ten seconds or so since your Q > W combo is fully up. but you can continue to use Q. basically you should help your team with the snares as with rylai's stacking up on the slow for both and doubling it with your ult if need be and let your team finish the rest off. of course thats situational. sometimes you can just destroy two ppl at once.
ive went 12/3/16 where most of my kills stemmed from the early/mid game and then late game i was able to only really grab assists and killing only when they had a few health left for an easy Q. lost the game so an okay score such as that doesnt mean ****. see below...
i have went 17/1/15 and lost the game again. a game loaded in squishies and 20 stacks with mejai's, the whole works but again, leblanc doesnt break the game as well as other characters can. plus of course you need a team. kills dont mean **** if it doesnt get you anywhere.