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nonsense.
Bunshin feints have already been proven successful against deva path, especially against an unfamiliar opponent as we saw during his battle with kakashi and lets not forget itachi's speed feats. With Naraka path being absent, deva cannot repair any damage done which is to itachi's advantage. The Rinnegan lacks the ability to anticipate attacks added to that, Deva path only performs Chou shinra tensei, (something that yata would repel) if absolutely necessary as it leaves him defenseless after he does so; a time in which itachi would finish him off using totsuka.
Please don't mention Chibaku tensei, it's prep time alone leaves Deva opened for amaterasu and the damage is permanent even if he repels it with shinra, he'll be loosing limbs as we saw happening to edo nagato. Added to his disadvantage Deva needs to evacuate the area of effect before he casts the gravitational orb itself; Something he wouldn't be able to do against itachi, his crows and his sharingan which strikes out chibaku in totality.
Itachi also has izanami which works using the opponents 5 senses and has no counter except accepting the reality chosen by the izanami caster and in any case or given scenario Deva would be finished long before he thinks about large scale technique. Lets not forget that Itachi has adept control over his Doujutsu's particularies for the 8 years he had them namely, Susano'o and Amaterasu hence, they're chakra consumption is at best; minimal.
