Late game Veigar
How do you deal with a Veigar late game if you are one of the squishing members of your team like a LeBlanc?
Dude gets slaughtered in lane but come late game his 1K AP leads him to easily one shot me.
How do you deal with a Veigar late game if you are one of the squishing members of your team like a LeBlanc?
Dude gets slaughtered in lane but come late game his 1K AP leads him to easily one shot me.
its hard, try picking him yourself? :P
other than that I can think of a few ideas like
ults
any assassin that can 1 shot him before he can react with an
these items help a lot

Tanks dont stand a chance against him just try to pop his ass before he pops your ass, if u can cc him before he cc's u etc...
one more small tip,
early should get you out of his stun before his W lands reducing half of his damage pretty much, enought o not get 1 shot and hopefully kill him, he's very weak after his first rotation/stun is down
Don't get hit by his skillshots? His ult doesn't one shoot you, it's more efficient on low HP targets. You can very well assassinate him too. Old veigar was much scarier (dfg R Q whenever u would come close and os), new Veigar is slightly stronger because less CD's and more damage and easier laning but he's not extremely reliable. So he does have a lot of counterplay now. And if you can't manage to not get hit by skillshots well get 
you don't be too squishy... and doesn't her passive prevent burst from killing her? lol
As leblanc , you kill him before he kills you . I understand how this could be hard to accomplish with his stun blocking your dashes easily, but all I really need to do is w into range and then just qre him from afar . If you have your items you will Pop him instantly.
Buying a Banshee's Veil can seriously help against Veigar if you can dodge his Q properly since that means it will likely be absorbing his E or R.
You need abyssal for laning phase, must purchase banshees veil late game and dodge his Q when you go in. DO NOT make the rookie mistake of trying QWR combo he will murder you. You need to poke with QR usually that is enough to push him out of a fight at least make him scared and respect your damage. Never use W in a straight line.
as an ap mage veigar can build to mr items. banshees and abyssal. and still have 1k ap late game so by yourself even as lb. there isn't shit that you can do. a stun is a guaranteed kill. Q and ult is a kill. a W can oneshot squishies if he has ludens