Is there such a tool as a low-profile framing nailer that can fit between studs set 16" o.c. for nailing blocking, but which also has swappable tips so it can do frame nailing of 2x members as well as aim nails accurately into the holes of metal-connectors? I've found the one, or the other, but not both.
You might wish to consider getting a pea shooter slide hammer or just making one from 1/2" pipe and rebar/rod. Usually you need a second person to position while you operate the slide hammer, but it will get a nail into extremely awkward places. It can't nail perpendicular due to the long shaft of course.