A super-technical problem testing balance and flexibility. Establish easily enough on good sidepulls and a good foot rail, then balance up on more sidepulls to a slopey gaston feature in the small roof. Improvise a way over the lip to a good crimp (most opt for a hip- and shoulder-tweaking wide stem, but several options are possible), then keep crimpin till you can reach for the slopey top of the boulder.
Location
On the right side of the large warmup boulder split by a deep offwidth (a couple minutes past the first humongous boulder you reach.)
This really is a tough one to grade. I've seen some moderate climbers practically cruise it, and I know some super strong climbers who throw frustrated shoe-chucking rampages over it. I agree with Tavis though, the grade doesn't matter, this problem is awesome.