Veigar Mains: Come Scheme With Me! The Rift Shall Be Ours! BWAHAHAHA.
We ARE evil. Stop laughing!
I think it's time for all us Veigar players to have a thread where we scheme together and figure out how we're going to obliterate all these fancy high-mobility Champions, and also Teemo.
So share your tips and tricks for Veigar dominance here.
I'm not great with Veigar, but I'll start this off with a few thoughts and observations, if only to provide something for people to critique and get the conversation going.
Movespeed
Movespeed is very strong on Veigar. Why? Because if Veigar catches the enemy, your whole team does. (Secondarily: because he has no dash or other mobility mechanism, and he needs to mind his positioning.) I run MS runes and masteries for this reason.
DFG Rush
This might sound utterly obvious, but given his mana hunger, I often find I lose games because I give into the temptation to build lots of mp5 early. This is a mistake. Sorc shoes and DFG, always. No matter what. Beg jungler for Blue if need be. (Thank them for giving it to you, but let them know that, if the tables were turned, you should show no mercy.)
Lulu
Lulu? What? No! Who cares about Lulu? N-not me! Stupid Lulu. GO AWAY.
Teleport
I'm a believer in running Teleport on Veigar, for ganking bot lane by teleporting to a brush-ward. Veigar's stun is incredible: it buys your ADC and Support several seconds of free catch-up and autoattacks.
Megaburst vs. Team Play
The first trick we all learn with Veigar is the 100-0 wtfburst. It's a good trick. However, it's just not enough. These days, plenty of mages can 100-0 targets. Good Veigar play must center around his stun. Rather than always using his stun to lock down a target for a focused burst, consider using stun to lock down multiple enemy Champions for your team as part of the initiation. (Related: dropping a 1.0 AP meteor on multiple enemy Champions is a HUGE gain for your team.) If you're fed enough, and the target is low enough on MR, you should be able to kill them with DFG+Q+R alone.
Stunless Meteors
If I could learn to hit these more, I'd be much better at Veigar. The damages are palpable.
Target Selection: MR > AP
You know how people are terrified of airplane crashes, rather than car accidents, because of disproportionate media coverage of the former? It's like that with Veigar's ult. Everyone knows that it scales on the target's AP, because that's such a weird mechanic. It's not insignificant, but it's not as important as it is novel and eye-catching. Instead, when I'm stalking prey again, I look mostly at the target's MR. Anyone with 30 MR is asking to be exploded.
Q: Harass vs. Farm
It's often said that (in the early game) a good Veigar uses Q to harass, while a noob Veigar uses Q to farm. I think it's a bit more subtle than that. Veigar is so weak in lane, and so vulnerable to getting bullied/multikilled, that I agree it's important to Q your lane opponent in the face periodically. (This can also help set up early kills if your jungler comes by.) On the other hand, every Q effectively doubles the gold value of a minion. If you use Q to last-hit 10-15 minions, that's getting close to the value of a kill in bonus gold. (And that's bonus gold that's automatically converted into AP that doesn't consume inventory space, too.)
Support Veigar
I don't think he's a great Support. However, if you're a Veigar main, you might end up playing better as Veigar Support than as Leona or whatever. His stun can shut down aggression and lock in gank-kills. He's also got some nice poke, and Frostfang is still OP. Another bonus: if the game goes on long enough, Support Veigar becomes Regular Veigar.
Tankiness
I build glass cannon these days, but I recall that (a long time ago) a player who's much better at LoL than I am argued that Veigar should build somewhat tanky. I'm not sure if that was ever true, or if it's still true, but it's something to think about. The argument: if he live a little longer in teamfights, he can get off two or three stuns instead of just one. The counter-argument: these days, there are so many wtfburst assassins that if Veigar gets caught, all the RoAs in the world won't save him.