Ok i don't know much about Deidara, but here are some things, this is the range C2 mines effected:
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It does not seem like a tech that can be avoided quickly with the speed Orochimaru have shown so far based on its AoE.
Also he has C1 bombs that he can blow up at the time he is willing to:
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(Not saying these would get to Oro and kill ASAP, but they can be used for diversions)
Also C3, again another attack that cover a lot of ground and would have soloed a village:
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