Itachi's only move-sets that can take out the Rinnegan summons are Amatersu and Susanoo, and both of the said Jutsu deplete the majority of his Chakra in a very short period of time, as seen in his fight with Sasuke. Itachi himself said he can't use Tsukuyomi at 30% of his Chakra, when Pain duplicated him in the start of Shippuden against Team 7; this literally suggests his MS techniques consume more than 30% of his Chakra per usage.
Animal Path's style of fighting holds on advantage on Itachi, because he'll just overpower him with numbers and pressure him to exhaust himself. So like I said, either Deva or Animal Pain would demolish him with ease individually. I can't describe how graphic if the 6 of them came at him.