I've considered using QR, but he also has to have the durability for it. Something like +Def + Fury gets him to life 40 Def, I think. It works a lot like Lukas' usual built, albeit this dude can tank both ends (magic & physical attacks). You could also mix in a Delflect in there for SS, considering he'll get doubled no matter what.
If I get a Jakob, I want to give him a Brave Bow. Basically, a ranged Effie.