This is a good matchup. Oonoki's jinton can end chibaku tensei. However, if he tries using it on Deva, he'll just pull a rock into him to knock his aim off, like he did with cloaked Naruto to divert a biju bomb. Deva's shinra tensei would only be effective if it smashed Oonoki into the ground, but Oonoki can fly to get around that; probably faster than Deva's propelled jump to stay above him.
I'm not sure which side to believe in the bansho tenin argument, but it does seem the chest is pulled out and the arms are backward, at least near to Deva, so I doubt Oonoki could punch with a rock fist or make hand seals to do anything else. He also has a bad back, and the way it would be compressed during a bansho tenin pull would likely aggravate it, ending Oonoki's chances.
I'd probably give this to Oonoki 6/10... if Deva starts with bansho tenin he'd win imo. If he shinra tenseid Oonoki would start flying and then Deva wouldn't have enough time to recharge to knock Oonoki's jinton aim off with a rock if that would be possible when he's up in the air. So this battle depends on what Deva starts with.