circumstantial

I think it would be good to first go over what you want to accomplish with her first. It doesn't have to be a super detailed outline, just a quick overview of what you both want to accomplish. It's also good to do it in a way where you both have input as it happens so it's a true co-op instead of being more like an RP. I think it's a good opportunity to play off of your respective strengths. I hope this helps!

I have. It entirely depends on the person. I ended up doing this one thing with my friend where we ended up almost tag teaming it. I tried with someone else too, but they weren't very good and were kind of awkward, so we ended up abandoning it.