Or use the B747-8F...after we start getting them later this year.
The performance manual should be out soon, which will make interesting reading. Well, for a few people. But at this point we know that the -8F carries less fuel than the -8i, so it appears to me that the -8F (like the -400F) is optimized for payload rather than range. But I might be wrong, in which case my wife will no doubt add this to the list.