Sweet looking guide. Also a very interesting way to build him. Gonna give it a try tomorrow. :)

1. Typos: Not many, just check for them at these spots: Check your explanation of the runes, you said "for zee blues, I pick these seals", in your skill sequence explanation there's a space missing, under the force pulse section of this even more: I believe you mean a R, Q, then E combo? If not, maybe E was just supposed to be added? Last section: Be AN ***hole (Which, by the way, you might want to just consider taking that out of the guide... completely unnecessary.)

2. I think you should definitely add a "situational items" section. QSS seems like it would fit in more there. Also, to go along with this, why QSS? There are several other MR items, and it's active is only really useful against a CC heavy team. You might just want to elaborate on this.

3. Definitely elaborate a LOT more on why you don't use other Summoner Spells; How is Ghost/Exhaust not good on Kassadin? Why should I not use Clairvoyance or Smite on him? Just more explaining on that in general.

4. I think you should try to elaborate more on a lot of things, the build in general. Maybe add some videos or a screenshot of your match history with him.

Overall, I think it's a good guide (Not really a great Kass build, just wanted to see what this was), I just think you need to add more to it and it will be a great guide someday.