Slayer Pantheon - now with a hockey mask!
I think the mask of Pantheon is too anonymous, and the details are hard to spot, especially the eyes and the contours around them. My suggestion is therefore to add a hockey mask, which I also think fits the skin and adds to the survival and Halloween theme. The traffic sign shield could be modified to have duct tape instead of the small, white stripe. In my opinion, it would look more like something a survivor of a zombie LoLpocalypse would use.
Before vs. After http://img.photobucket.com/albums/v709/stigtrix/Concepts/LoL/Slayer%20Pantheon%20-%202.1_zpswjdikgb0.png
If duct tape cannot fix it, nothing can! http://img.photobucket.com/albums/v709/stigtrix/Concepts/LoL/Slayer%20Pantheon%20-%20Taped%20Shield%201.4_zpspeowr38o.png
Even small shields can be improved with duct tape! http://img.photobucket.com/albums/v709/stigtrix/Concepts/LoL/Slayer%20Pantheon%20-%20Taped%20Shields%201.4_zpsrdmcv7u7.png
new hockey masks to Jinx that look a lot like Pantheon's :)