Nagato wins this mid diff at most
--Having no intel on him is terrible for his subordinates, as Nagato can overwhelm kisame rather easily through ST, Multiple Summons, and Shurado missiles and him attempting at CQC would result in him getting killed through ningendo or shurado
--Kisames suitons are countered by preta completely, and so are all of itachis MS techniques such as amaterasu, YM, and Susanoo slashes
--Boss sized ST from point blank range can bypass their durability with ease alongside BT beinng used to pull both of them in, simply results in them getting immobilised through chakra rods
--GM soul dragon can also one-shot both of them with ease and CT is also a GG since both oof them lack the firepower to destroy the core, thus resulting in them getting killed