This build uses Kassadin as a DPS, Attack speed and ability power hybrid. Unlike other builds this one makes a great use of his W in order to increase your magical damage output. However this build is very squishy.

Pros: Cons:
Great DPS damage Squishy Early game
Easy escape Need's a lot of gold.
Great ganker Get's Focused
Strong late game

Early game you should start out with boots and 3 health potions. Once in lane try to land last hit on minions with your Q and keep your distance from enemy champs because you are too squishy to fight unless your lane partner can keep you alive. Occasionally harass a champion with your Q. If it's a Nasus, Veigar, Gangplank, or Wukong. You can disrupt their farm by silencing them before they activate their minion finisher. Try to maintain your mana pool by auto attacking with your W's passive.

With good minion farm and maybe a kill or two you should have your malady and berserker greaves. Although you still have a small health pool you can use your ultimate to charge into fights, Silence the enemy, snare him with your E and activate your W to increase your damage, and continue to auto-attack them. Keep an eye on your riftwalk stacks because you can easily drain your entire mana pool. After you hit level 6 you can begin ganking other lanes, but remember to keep gaining gold and continue farming minions as well.

Once you have your rageblade you should be destroying minion waves and champions the hextech revolver and vamp scepter should be giving you enough lifesteal to make auto attacking rewarding and not a waste of health. You can chose between getting wit's end, if you want some magic resist, or bloodrazer, if you have the gold and if they have a lot of health, like olaf, shen, volibear and other HP based champions.