First off, let me just say, I despise Graftobian for anything but stage. Way too heavy/cakey/masky, and I've tried, and worked with professionals who just could not get it to work. But anyways...
You're probably better off ordering singles. Seriously. I ordered the warm palette for a stage gig I did, assuming that 1.) the depth progression would be steady, and 2.) they would have more a yellow undertone. Wrong in both cases. The shades started off with a near ivory, progressed into about 2-4 fair shades, then about 10 olives, and 10 ethnics. Not at all what I wanted for an all Caucasian cast. And the undertones ranged from, dare I say, white cast, to olive, to green, to pink, with only two to three having a true pale yellow. One person was about the second shade in (forget the number), but has dark circles under his eyes and some deep discolorations. So I moved to the next shade lighter, and on his skin, it was about 4 shades lighter than the other, and gave him reverse racoon eyes and white blotches all over his face. Needless to say, it was also impossible to blend out (because of the consistency), and I had to start all over. Ridiculous Although I haven't tried it myself, judging from what I've seen, you're better off going with Neutral, which actually looks warmer than the Warm palette. I go with Rae Morris's philosophy of matching foundation to chest color (if it's shown) rather than neck (won't go into the why here), and most, except for about 5% of clients, have a yellow tone in their body coloring, or will benefit from it, as yellow undertones can bring life to both yellow and pink undertoned clients, while pink undertoned foundation will make yellow undertoned clients older and tired. Purely recommendation, check out other palettes. Depending on what medium you'll be working with, check out Cinema Secrets and RCMA. Good luck!