1. Jabra. He is considerably strong, especially in his wolf form when he is using his Tekkai Kenpo. He would just speedblitz Boney and won't let her activate her ability as she didn't show anything apart from it that would let her win this fight. And he is stronger Fukuro as well.
2. Fukuro. He isn't as strong as Jabra, but still is considerably strong to take down Boney by speedblitzing her in the begining of the fight to not let her use her ability to turn any opponent either in an elder or a kid.
P.S. I just don't see what Boney can offer for now to her opponents aside from having a tricky DF ability, but it absolutely didn't help her against BB and his crew and neither against Akainu, thus I can't see any option for her in a fight, where everything is mostly decided by speed and she never showed anything worth mentioning in that department.