it's good :)

didnt wanna bla bla much with pros/cons etc , if u have leblanc u know its simply sick champ.
Ill only comment my runes and items. Runes : simple , on lvl 6 ull have 50ap with just doran ring , max out sigil and distortion only if enemy is squishy , if some1 with more HP and tanky than expected put 1 point in etherial chains before lvl 6 for safe kill , after a kill on mid stick around some more 4 few bucks if u dont have enough gold 4 mejai and boots of speed , check out lanes situation , and go get yr snowball stacks . My attack would always be prefered W(2 hit) Q > R with that if target is on 60% life , its a kill 100% ^^.
NOW items : i always max out AP , that means always go 4 rabadon 1st than void staff 4 penetration , than its up 2 u ,would u gona zonya or morelo 1st ... decide how game develops , if only 2 AD i chose morelo 1st , if 3 or more AD go zonya and thats about it , only in cases of hard nukers as veigar i chose Abyssal instead of zonyas. NOW u prolly ask yrself and me , how can i kill and stay alive with 1750 HP , well im getin' ranked games with leblanc like 90% wins ... and every game with 20-30 kills with 1-5 deaths TOP . Its all matter of feeling when u get into leblanc , ull know exactly when u can kill an enemy with just Q > R , and survival is in my opinion very best ive playd so far , only thing is if ur 1on1 use etherial chains , if not use it 4 slow 2 escape ... + u have yr flash and 2x distorion in case of gank atempt on u ... GL HF and 2shot ppl! :D