Talk:Cho'Gath/@comment-28489976-20160518120714/@comment-5160958-20160806192230

rabadon's is probably not worth it unless you are full ap. Other AP items add all sorts of useful effects that really are way more helpful than the deathcap's extra ap. rylai's will make your scream and auto's slow, for example, as well as give you a chunk more hp. protobelt will give you mobility, extra burst, hp, and cdr. look trhough the other ap items and read what they do. they're all better than rabadons individually. rabadons is meant to literally "cap off" a full ap build by amplifying the ap you already have, so if you have more than 1 defensive item then its probably not worth it.

second thing is I would skip void staff in almost all situations. Cho'gath's ult give him true damage that scales with ap. This true damage give him a built in ability to chunk through resistances, and it also makes up at least half your damage as cho'gath. It does not benefit from magic penetration AT ALL. many other options are better than void staff. Basically any other ap or tank item would be better.

just my suggestions. if you're been steadily climbing in ranked, then don't stop what you're doing...but when you plateau consider these suggestions. I just noticed that I'm replying nearly 3 months after you posted, so you prolly have realized alot of this already, but if not, I hope it helps.