Thanks on the comments all.
Although I disagree on your comments on Revive Xenasis (9 minutes just makes it totally nonviable imo and could only be used to punish bad teamwork which from what I've heard is CLG's main issue, great players bad teamwork, also I like hyperbole), I definitely will add in the Oracle's comment- I kinda view that as general player knowledge but best not to assume. I'll probably put in a few lines on wards too. Also the reason I go for Spikes before Scream because Scream's silence doesn't get too much better as you level it and becomes your most expensive skill, and because Spikes are great for hitting enemies who think they can hide beyond a line of creep. It's good counter-harassment. It also serves to functionally double your autoattack damage and makes it hybrid, making you a wee bit less mana dependent in your farming.
@Valaras- My comments on fortify is my general opinion on it. Sure, it prevents it for a time, but if your tower is being pushed that hard, it's generally screwed anyways. I have never seen a point where popping Fortify did not actually prevent the tower from going down- it just delayed it. Also I think I will suggest a Rabadon's, makes sense to me, thanks for the advice.

pretty solid,i really like it, good work +1 from me

You're comments on Revive and Fortify are rather bad. For example, when in a 5v5 a couple of enemy champs are kicking your tower's hp down and you've got some casualties, it would be a very good time to pop Fortify. Same goes for enemy champs that attack you at your tower. Exhaust or slow them anyway and pop fortify. Saved my life countless times.

Now I'm not saying I choose this on every champ, but I do when I tank mostly.

OT:

The guide's good, easy to look at and a good choice of items, alternative items could also include a rabadon's if the enemy's team isn't that good or just doesn't do that much damage.

Revive really isn't that bad - on certain champions anyway. Much better than Rally anyway.

Maybe on Cho it is, but that's no need to call it a "Worthless waste of a summoner spell".

LLL, a team that beat CLG (now twice in a row) had it on a TF. It might be bad on Cho, but if you have a global teleport you may as well have it as a 6v5 team fight, you die, revive, R back in again. If you didn't know, by the way, CLG are supposedly the best LoL team in the world - and won some tournament or something.

I'd say the skill order was a little iffy too, I'd recommend W over E.

As Cho you might want to get your Oracles earlier too, maybe after your GA, it's really good for spotting any sneaky wards.