Borimir doesn't really fit in either. I don't know what to do with him. I don't want to level him up to level 20 or whatever, since someone got only 12k for exalting level 25. I don't really like his colours to breed him, and he wouldn't sell for such a good price.
How much do you even get for putting together a hard puzzle?
I don't know how to help you there. I would just exalt him, but he's a gift, so...
I hear 8100T is the max, but I have no idea how someone can put together a puzzle that big in such a short time.