If you avoid the Direct Crack (5.9), you can keep the level at and below 5.6 for the entire climb? Is that right? That is what "Climbing California's High Sierra" claims. How many pitches total?
If the Direct Crack is avoided, the hardest move becomes the off-width crack at the top of the Staircase (5.6-5.7). When Barry and I did the East Face, we only roped up for 4 pitches, but I think the total would be 16(?).
there's some pretty useful info. in these comments I think - would be nice if it could be added to the main route description page before some of it gets accidentally deleted.