User blog comment:Berserkchart486/Chakra Levels!/@comment-25152698-20151006111929/@comment-4869113-20151006150214

Well, no, it makes sense in respect to how it was done. Kimmaro, even ill, showed a level of stamina that surpassed both Gaara and Lee; considering Gaara was the jinchuriki of the shukaku, therefore inheriting its tremendous reserves, I wouldn't be surprised if he was a little higher. Tsunade can be a Senju all she wants, but the fact is she's never shown the ability to outlast a Jinchuriki. That's why he's ranked higher.