I don't think you're on the right track. You're adding a lot of artificial constraints to what your portfolio should look like.
Why do you decide on 60%/40% growth vs value? Why decide on a set percentage of how much should be in Asia, compared to Europe? As Pete mentioned, companies might be headquartered in the US but do 80% of their business abroad. And we don't even know how the global stock market will be distributed in 20 years.
Instead of overly complicating your allocation, just buy the market weights. It's the principle behind index investing (and probably the weighting used within most of the ETFs you're looking at), so why not apply it to the whole portfolio?
Market weights already factor the opinions of all market participants as to what each country, large/small size, growth/value flavor is worth, and this is powerful information. A lot more careful analysis went into determining that Apple is worth 2.4 times Facebook, than into your 70%/30% core vs satellite allocation (I don't even know what you mean by that).
My advice: For stocks only, buy VT (a low-cost, whole world ETF), preferably commission-free, and forget about allocations.