I think Eliwood X Lyn makes the most sense. Eliwood and Ninian as couple are too complacent for my taste. I don't like pairing Kent with Lyn because I feel like their backgrounds and status levels are just too different for them to work (Although I don't mind Kent as a unit during the earlier chapters even though most prefer Sain). Eliwood and Lyn's relationship is a lot of give and take. They seem to push each other to be more than they could be on their own. AND Welcome to the Forest, my friend.