BY FAR! Farkle is already with Smakle, who is perfect for him. Riley and Lucas have a STRONG connection with each other. They don't need to do the typical couple stuff like holding hands and all of that to be together because eventually that kind of stuff fades. They're able to talk to each other and connect on an emotional level that's more than just a "brother and sister" thing. I find Lucas and Maya to be more like a brother and sister than Riley and Lucas, but that's just my opinion.

it seems like farkle and riley are like brother and sister to me