As I showed you before the information about the guides are on the top.

as always at the beginning levels brand needs a potion of mana or you can get blue buff, anyways if your going against a champion that counters you like kasaddin, you should always try to get the first hits on him but u must be careful, i usually use the W rather than Q or E because of its damage and range is pretty good so...

you should always stun or throw your Q at him but you must do it fast and when there's no minions around him.

first you keep attacking him with your spells, which ever one is possible, i usually use my "W" then "Q" then "E" just to set him ablaze.
here are the steps:-

1. Keep attack using "W".

2. Once he sets a potion u should try hitting him with your Q to decrease the healing and increase the blaze in other words... to decrease his health and its like ignite.

3. Once the target has 3 bars or lower of health you should engage using your Q for stun and W and E very very fast and ignite him and keep basic attacking him and he will die and u should probably flash away if jungler is coming or if he used barrier on him self then if you want to get the kill you should flash and use all your abilities on him.

4. you should always look out for junglers or gankers and set wards at both bushes while in mid lane, and you should always see what the champion is buying to counter those items like if he gets magic resist you should get magic penetration and more hp items like the ones I put up.

5. If you follow these simple steps and play safe you should be able to do good.

for team work you should use your ultimate first, but be sure to use it while all 5 targets/champions are together to hit them all at once.

once on farming never use your abilities that will just waste your mana especially when your at a low level and your AP wont do much to minions and save your mana to attack target its better for you instead of going back to base and getting mana potions.