It's an HS setup, there's an Irish Tour in the neck position. I have the NB pretty close to the strings (it's LOUD), and I adjusted the height of the IT so that it was just the sweet pot: plenty of power but still enough sustain. There's a certain height with singles where sustain suddenly drops -- I adjusted the IT a little bit lower than that.
The NB's definitely louder than the IT when clean (didn't try to balance them, though, I went for maximum power with each one... ;)), with overdrive, though, they sound more balanced. With high-gain they're perfectly balanced. Tim originally recommended me a Trilogy Suite for the Nailbomb but I chose the IT for a more traditional bluesy character. Note that, though, it's an HS setup with only three positions. I believe a NB/IT/IT HSS set would be near perfectly balanced.
A Nailbomb would definitely overpower an Apache, it's not only low-output but also round, sweet and vintage sounding, which doesn't help it compete with the Nailbomb in AAAARRRRGGGH kind of music, lol.