This is me assuming that this is your first time making a guide.
The first thing you should add is a skill build, for 1st to 3rd Job for KoC. Also, skills and skill descriptions would be helpful. To make a guide look more professional, don't use improper grammar and words like 'lolz' or 'eq'. Use full words, and full sentences.
Now, onto your info. First thing that caught my eye is the Titiana egg: Every KoC gets it. You might want to get that out of the way. There are also many cons, such as no Shadow Star, and low HP. Pros include how they train extremely fast during 2nd-3rd Job with Vampire and Poison Sling.
All in all, this needs to be polished a bit more, and added more information for the people. Otherwise, not a bad first attempt.