You can also mod the leorics crown to three sockets and then add modded rubies to get a large amount of XP. It is possible the 100% increase on leorics crown is only a XBOne item (I do not play 360 regularly), but I recall the editor having several versions of that item and only one was the (last) new patch.
I would be happy to send one via mailbox.
I would be happy to send one via mailbox.