• Asura Path -
Han (5) [Armor]
> Han's the most physically imposing member of the Ex-Jinchuriki, and he's also covered in specialized armor already. It's the most obvious choice for his abilities.
• Human -
Utakata (6) [Soulsucking]
> I don't know a lot about Utakata, since I haven't seen the anime episodes with him. From the descriptions of his bubble techniques, he seems like someone who would use an ability with a two-fold tactical use, which the Human Path offers by mind reading and killing the target at the same time. He also looks slightly similiar to the previous Human Path.
• Animal Path -
Nii (2) [Summon]
> As the 2-Tails, she used her full Biju form to attack Hidan and Kakuzu. It's because of that direct beast combat approach that makes me assume that she'd be the most proficient at tactics with using summoned beasts. Her eyes are also similiar to those of the previous Animal Path.
• Naraka -
Fu (7) [Interrogation / Restoration]http://naruto.wikia.com/wiki/King_of_Hell
> 7-Tails was a flying Biju, meaning that she's probably a distance fighter, and best suited to remaining back from direct combat and from the other Ex-Jinchuriki. This would enable her to to use the Naraka Path to interrogate captives, or to regenerate troops, since the Ex-Jinchuriki Paths of Pain are already under the effect of Edo Tensei.
• Deva -
Yagura (3) [Gravity]
> Yagura makes the most sense to act as the leader for the Ex-Jinchuriki Paths of Pain, and thus I'd put him into the Deva Path. He's also the smallest in stature and would benefit the most from an indirect wave-like attack like Shinra Tensei. The fact that he wields a large hook-like weapon could be useful in conjunction with
Bansho Tenin.
• Preta -
Roshi (4) [Chakra Absorption]
> Roshi was known for using Lava Release Techniques, which is a Kekkei Genkai. Of everyone, he's the most obvious asset that would benefit from absorbing Chakra, based on what we know of their techniques. His attire suggests that he'd be in close combat as well, which would mean he'd be able to use it as a counter at close range.