What to do with SPD+ ATK- Halloween Jakob?

So I was pulling colorless in hopes to get Genny and/or Robin, and as I figured, this dude drops by to shit all over my pity rate (though it was just at 8.50% and I got him on the first pull of the session and summoned on the other four orbs so it's not a big loss). Unlike just about all of my pity breakers thus far however, he decided to break the tradition of my pity breakers having decent IVs. Apparently, he's well aware that I dislike him. Any ideas of what I should do with him? I might ACTUALLY use him because his skills aren't all that when it comes to inheritance.