Not Updated For Current Season
Evil is Everywhere - Bot and Top Guide
When you is going bot or top with a mate, don't be afraid, will be alright. You will be in the heaven: there is walls everywhere. The most important thing you need to do it's buy wards and put into the grass, then you can see the units who are near the walls, so you can deal the double of damage and stun them for 1.5 seconds! (Condenm bonus when the target colides with a terrain).
I chose Falsh to you set up your position before use Condenm on the enemy. With Flash, will be more easy to hit the target against a terrain. And ignite, if you need to deal a bonus damage.
The items to purchase are really simple: Attack Damage in early game to your skills deal a really good damage, and life per cent to combine with Silver Bolts in late game.
You're free to buy Health Potions, but i think The Bloodthirster can take care of you missing health issues.
The Strongest Evil - Mid Guide
Vayne is a nice pusher. You can also deal bonus damage to towers activating your ultimate and using tumble (Tumble will give you bonus Attack Damage for 6 seconds, if you just hit towers).
I chose Flash to you set up your position before using Condenm (you will rarely need, because mid don't have walls. That's why you will level up Silver Bolts), and also chase your enemy. Flash you can use to chase, when you see that Silver bolts have two stacks, and the enemy have 100 HP.
After buy The Bloodthirster, you will buy Frozen Mallet, wich will give you health to survive after Tumble, and after try to pass through a wall with Tumble. Frozen Mallet will also give you a right % slow to your target per normal attack, what's nice to activate your 3rd consecutive attack, dealing bonus damage.