Laylea and Sharlow are pretty good. I've used them once before. The only thing I see the problem with for them, is they have a much harder time getting money than Sylvia's children. They have innate Prayer, and can much easily abuse the arena. I suppose you could have Laylea fall in love with Aless for money for rings or give her the Prayer Sword. The Prayer ring comes a bit late though. Berserk and Charisma are always nice though, and the Barrier sword is pretty good. I'm surprised you don't have Sylvia paired yet. Her growths are obscenely high so it's hard to not pair her unless you kill her.
Tiltyu's subs are okay. Linda is basically a second Tiltyu and she has Elite. Amid isn't as good, but he's still useable. He promotes to Mage Fighter, but he can also still use Tron.
Whatever you do don't get Briggid's subs. Aeselleo is basically Jamka. I used him in a draft and he was actually surprisingly good, but Daisy is a lost cause. She can Prayer abuse I suppose, but she's not promoting unless you stuff a bunch of children down her throat, so she can't get as much money to pass around, which is what you want her to do. If you have the choice, you definitely want to pass down the Ichival.
I'd suggest Briggid x Holyn. You're probably going to have to wait a bunch so they get adjacent bonuses, but otherwise it's great. Holyn can pass down the Hero sword and some other things, and Patty also gets Luna. You can also get her the Prayer sword if you do the breaking glitch with it. But otherwise I'd say Alec, Beowulf, or maybe Dew for her. It's not as good as Holyn, but they do give her Pursuit/Charge, or a Sword skill.
The only other thing is Lachesis x Fin. I've heard it was good, but you can only get the Silver Blade and Thunder sword for Delmund. They don't really need Prayer, which is why I prefer Beowulf for Lachesis. Charge is much more useful, and with it, Nanna can actually finish things off sometimes.