I think the 'berserker' set is the best guess so far. Fits into the lore nicely as well.

As to perks I would guess they will stay along the lines of what we have seen meaning a +bonus to an existing skill and/or a +resist (potentially a new one with the new biome).

I don't see them adding a new combat move or a specific weapon bonus, but instead will stick to general weapon skill (+clubs instead of +Iron Maul).

But who knows...