I'm sure you are all looking at this build and going, ewww... ahhh... another tank cho'gath, but that is not what this build is and thats not what it's intended to do. This is a "Harassment Build" designed specifically to maximize you ability to be annoying and to allow your team to hit them where it hurts. The goal of this build is assists not kills and protecting your stacks has to be your number 1 priority if you lose your stacks your not helping your team. Some will look at this build and say there isn't enough dmg in it and really thats the point of the whole build ... if the other team ignores you and focuses your team you are a knock up wielding, silencing, true dmg dealing war machine that can run over your allies to block vision and thus targeting on smaller heroes such a teemo or even akali, and if your enemies are ignorant enough to target you ... well then your DPS is going to rip them a new hole while you laugh off massive amounts of dmg and dish out a little yourself. Never forget your stacks are the most important thing get them quick and keep them.

Pros:

1. The cool down allows you to spam your spells and protect your team
2. The early money generating items provide both massive regen and the ability to spam your spells letting you farm quickly and last hit minions maximizing the effectiveness of cho's passive
3. Cho'Gath is painfully tough and the burst of true dmg allows you to still stay in the dmg

Cons:

1. You don't have a taunt so you can't force anyone to attack you
2. If you dont harass enough no one is going to care if your there or not
3. You have very little dmg late game so you much have decent dmg dealing team mates that you trust

Team work is what this build is all about, the massive regen and raw dmg of cho'gath along with the innate fear of cho'gaths ultimate will keep people at bay for only so long. When the time comes for the middle and late game fights if you don't have back up you can kiss your stacks goodbye and that is not acceptable ... Size does matter when it comes to cho's domination. Keep your team mates close ... Be there for them and make sure they are there for you before you risk your stacks. Once you have your stacks don't be afraid to use feast not as a killing blow but as a nuke... it's ok not to kill your foe because thats not your job ... Setting them up for failer is. Feasting off 1/2 your enemies HP and letting your DPS swarm the weak link tears a 3v3 or a 5v5 into a 3v2 or a 5v4 and the later has a much higher survival ration.

You are the King of Farming Cho's innate ability is very nice for farming and the early philosophers stones allow you to spam your spells for greater farming potential the single lvl of vorpal spins also nets you the occasion minion kill and creeping can be done quickly and effectively allowing you to get out of lane quickly and get back in lane before the next wave comes. Save your bite for the big creep or tank minion and build your stacks as fast as possible.