Cho'Gath E build
I don't play Cho'Gath that much anymore so I thought it would okay to share a neat build/idea with him. People have probably already figured this out so I'm not trying to take credit for this or anything.
With these items
Cho Gath's E becomes a very powerful asset to teamfights and takedowns.
- Rylai's gives W and E a slow, making it easier to land Q.
- Even if you miss abilities, You can still take down an enemy with strong E effects.
- With Rylai's, E has a similar effect to Frozen Mallet (Not sure if it's as strong after the Rylai nerfs but it should be fine.)
- With Chogath's high AP scalings, the little AP provided by Rylai's and Nashor's is enough to deal good damage.
Guinsoo's can be replaced with Void Staff for Magic Pen or another Tank Item. You have 2 free item slots for situational items like Banshees, Randuins, Frozen Heart, etc.
About Guinsoo's, I'm not sure if the E is proc'd twice due to it's effect. I've tried in games but it's hard to tell but I think it might be. If not you can replace it with 
. Once you have Nashor's and a 2nd attack speed item, that's when it starts to get crazy.
EDIT: It doesn't proc twice due by Rageblade.
Feel free to add your own E build or other Cho'Gath niche build
