Within the Sorcerer & Sword rules, it is possible to "Trade Down" your humanity on a 1-to-1 basis in order to raise another Score. Keep in mind that such things have story associated with them.

Clinton R Nixon

If your character has traded in three points of Humanity during creation, then those points were lost over something thematically important in your character's history. He's extra bad-ass, but there's some significant reason that he's lost that Humanity, and that significant reason should be just as bad-ass. [1]

Ben Lehman?

I have used as a house rule that Humanity trading can only be used to raise your highest attribute of Stamina/Will. The mathematically inclined may see why this is appealing. This is a house rule, though, and not endorsed by anyone official in the slightest.