Why not make Seerus' mission a shadow lair, not that it's avaiable for everyone.
Shadow OCH will be the lair for the real masochists, with an insane amount of gremlins and other difficult stuff.
But as everyone knows, any SL will give you an SL mat which you can craft SL gear with (helm and armor), BUT we already have the Seerus mask,
so the 2 pieces of gear you should be able to CRAFT from this SL would be 2 things out of the following list:
-Shadow rocket hammer.
-That saw the gremlin ninjas use, (normal attack would be a slash, charge would throw 3 sawblades)