So I've finally decided to request some pairing advice, and as much as I'd like to ask "Ross, the Fire Emblem Expert" for help (I would link to his "guide", but I don't want to drive up his PageRank), I'm not actually interested in gimping all the kids.
Anyways, this is what I've got so far:
The pairings set in stone are:
Chrom x Olivia
Avatar x Lucina
Cherche x Gregor (this is for personal preference much more than optimizing)
I think the way it's gonna go is probably Nowi x Donnel, Lissa x Kellam, and Panne x Fred.
Mostly, I just don't know if Owain would rather have Sol and Armsthrift (for infinite Missiletainns, because swordhand) or Luna.
Virion can continue philandering without incurring the wrath of his wife (although he'll probably incur the wrath of plenty of husbands).
I'm fine with criticism of the other pairings, but I probably won't change anything without a really compelling reason.