How to Make/Edit Item Set
im sure that after Riot announced the remove of the Item Set editor from the Client, some people are sad/ upset, even if Riot claims it was an unused feature, there are some of us that really liked it. There are already some programs that can lets you import the build from Champion.gg and im sure someone would be working on a decent App to make your own set and import em to the game. but till that happens and for those interested, here is how you can make your own sets with Word and a text editor (Note Pad) (word is not really necessary, but the color code helps to keep track of what are you doing) This is how the most simplified version of a Item set look on Code
> {
> "blocks": [
> {
> "type": "Name Here",
> "items": [
> {
> "count": 1,
> "id": ""
> }
> ]
> }
> ],
> "isGlobalForChampions": false,
> "isGlobalForMaps": true,
> "map": "any",
> "mode": "any",
> "priority": false,
> "title": "Item Set Name",
> "type": "custom",
> "uid": "LOL_7048BA83-6F8F-546B-8524-68A1B1494D34"
>}
from "{" to "}" constitutes the whole Set, and the part we need to Modify are the Blocks and the Item within the Set
-We are gonna call this Block Code > { > "type": "Name of Block Here", > "items": [ > ] > }
-We are gonna call this Item Code > { > "count": 1, > "id": "Item id" > }
so Set in-game vs a Code Set Looks more or less, like this (Color Coded for easier understanding) http://i.imgur.com/eU8KNcF.jpg
The text on black should not be touched or erased, and the Yellow is the Name of the Set and the Individual Blocks
To make your own Sets, all you need is to Copy a Block Code (Green) within the "[ ]" of Set code (Blue) and an Item code (red) withing the "[ ]" of Block Code and place the Item ID for that of the item you want (in this cause ID 3001 is 
)
http://i.imgur.com/OF6pzzB.jpg
To add extra items, at the end of the "}" of Items Code add a "," and the copy a new Item Code below, same with a new Block, at the end of the "}" and a "," and copy a new Block Code below. NOTE: THE LAST Item Code within a Block and THE LAST Block Code within a Set MUST NOT have "," after their "}"
http://i.imgur.com/wuJVST9.jpg
In Game http://i.imgur.com/KGb6HY4.png
So Plan the lanes you are gonna use and the Items within each, copy the Block Code and Item Code you need and then add in the Items ID
Once you have the Code Ready, open a Notepad new document, Copy the code and save it under any name you want but finish with the extension ".JSON" http://i.imgur.com/op9P72R.jpg
That file is the one the engine reads to generate your Item Set in game. all you have to do now is drop within the Folder of the champion you want to use the Set on.
the usual path is C:\Riot Games\League of Legends\Config\Champions[Folder of the Champion]\Recommended
Here you can download the Word document Color Coded to edit and the list of all Summoner Rift ITEM ID https://www.mediafire.com/?1hbvhmhj81hblaf
same ITEM ID list is at http://pastebin.com/QakwiwSc which I plan to update once the Pre-Season items hit
Last bout not least, you can get the Items ID from board itself. when you want to add the emoticon of a item. (example) a show in the body of the comment "{{item3001}}". this code (3001) correspond to Abyssal Scepter and is the same code used within the game. so does apply for any other item. All the code in the Board are the same as the ID codes for In Game
