You are right... the V in the 0X family are a little strange to me too... But I have more problems with V04 than V06. It just has a little too much hot pink in it.
Here is what I would do if I were starting again:
R29 - R22, R24
YG07, 05 - YG03
G07 - G05 and G02... However, I would probably order G21, 24, 28 before I ordered more of the Ox family.
E07 - Probably E04 and E08... but I don't use these a lot, so I am not sure. I tend to use the E31, 33, 35, 37 family the most.
Y13 - Y11 and Y15
YR04 - I actually don't have this one, but I do have YR02 and YR07, so those would be good for blending. I have blended YR02 with YR07.
C6 - With the Grays, I have every other one and I think that is a great way to go. (with the Cools I have C1, 3, 5, 7, 9 with the Warms I have 2, 4, 6,
Not sure if I helped