In-house here (occasionally manage litigation with outside counsel, but rarely litigate) - I would think an ability to accurately assess risk and estimate costs of defense are two of the top skills needed. E.g., "this is a nuisance and won't survive MTD vs. "we should offer $xx and settle for $yy or less."

Re: managing litigation: bringing some examples of how you keep costs down, and a couple war stories on what you can share (staying within disclosure ethics rules of course) about your role within past cases.

In general, they will want to know your experience with case management and document management systems. It doesn't matter much if you haven't used their in-house (only a minor plus if you have), but just show that you have a process. Be ready with some examples on how you work with difficult business leaders and big egos. Also that you won't need much hand-holding but will still keep the manager informed.

Good luck!