Going Reposition, Luna, Heavy Blade, Quick Riposte 2 and Fortify Res for my Ike right now. Build guides tend to focus only on a unit's individual power, but I build around my team.
The Fury, Vantage, Moonbow build in the link above was one I was thinking of as well. My Ike is +Res and I want him as a mage deterrent. But I don't have a Fury available at the moment, and I actually like Heavy Blade a lot. Aether...eh. I don't see myself getting much mileage out of it.
Obviously I don't have QR3 available. Would be nice if they would put in a 4* unit with that.
With Fortify Res on Ike, I need to give Linde something else. Spur Spd or Atk would be ideal, but Spur Res would also be nice to help Ike take hits and make Hector laugh even harder at Reinhardt. Problem is...I don't have dupes of the units that give these abilities! It's strange how that's worked out but I only have one Eliwood, one Lilina, no Barsts...I do plan on a few more pulls later next week once we see Xander's banner. But yeah, awkward. I have lots of spur spd 2 and spur def 3 available, but I don't want to spend 2000 feathers on a subpar ability.
I saw Mist has a spur def/res ability...I'm assuming we will be seeing spur atk/spd soon. That'll be cool.
edit: could give Linde threaten spd 3 from the free 4* Navarre we just got. I have little experience using Threaten abilities, but it could be a lifesaver on those rare occasions where I get cornered. Could be nasty on defense too.