"...Well, it could be worse." She feels sorry for the poor sods who take the new door and aren't even remotely trained for this sort of thing. If she looks at this as an assignment, she'll be fine.
"I've no idea how your weapons work, but if you give me a primer and point me toward something I could climb, I can give your opponents something of a surprise."
There are advantages to having an innate ease with heights, and given how bad Cata is with close combat... well, she'll just have to hope her aim is good today, since she's a bit short on poisons.