The thing that stuck out to me most as far as them being so very seamless as they work together, was the fact that half the time in the middle of the battle - they don't actually tell each other anything.

It's just "Nat" or "Clint" and both of them immediately know what the other needs them to see/do. That's a helluva connection there, and I love that as a detail. The kind of partners that can have those silent conversations totally intrigue me!