Summs:
IGN Flash 95% of games
Go TP if your lane is completely unplayable without it, Ryze/TF/Galio for example
IGN TP is also an option however I dislike playing without flash as having it creates many opportunities to start a snowball
Build:
Lichbane -> Shadowflame (CORE)
2 items is your strongest point in the game and you will only become weaker as the game goes on. Super important for you to fight every objective and drop side waves if needed to hover your duo lane on mid
Mejai's/Dcap/Zhonya/Banshee/Void/Liandry's are your next item choices depending on the situation
Starting items:
Dark seal Refill pot 95% of games
Doran's Shield if matchup hard lvls 1-3
How to play:
Your goal is to survive lane until you have 400g, if you're up against a good player you'll usually have this amount on the cannon wave (4th wave) due to them knowing how to punish your weak early game.
Buy Doran's Ring.
When you combine Dring/Dseal/65 hp rune, you're getting a total of 205 bonus hp as early as level 4 which allows you to take more trades in lane when electrocute/sudden impact is up.
Even if I'm basing with 850g I still prefer Dring Amp tome over a blasting wand just because of the hp.