I was doing okay until the first infested mine, where I was met at the entrance by three seekers and a one star seeker. At least outside I can create space for myself and manage mutliples, but in there I get jammed against a wall and lose all my stamina blocking their attacks. But even outdoors it gets onerous having to battle seeker soldiers and flying puss bags to the death all the time before they destroy your base. I shudder to think that beating the Mistlands boss might unlock these critters to do raids on your bases.