I think there is something to eating more carbs for altitude.
I also remember starting Ginko Biloba about a month out for my first 14er (coming from 200' above sea level). You are used to 14 but with the additional 6k maybe check that out as well.
I remember reading that more carbs will help you avoid altitude sickness because I was paranoid that I might get it never having been up there before. Luckily it was no problemo.
Maybe read some training blogs for some of the other high peaks...