CT can kill the Sannin, he doesn't have to make a big enough as he stated he could of against 8 tail kyuubi (just use the one vs 6 tails). But that doesn't change that fact the Sannin has knowledge on the tech and will use everything in their arsenal to destroy before it becomes a threat.
I don't get it, why do you think that it takes so much time to create and shoot up ? :s
1. Look at this pick, Deva is running from Kyuubi form, and the Kyuubi is in the air, about to jump on him.
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2. Deva has created the sphere and throws it into the air
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3. The Kyuubi and Deva still literally haven't landed yet, and the orb is already in the air and has started to attract parts of the earth
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4. The Kyuubi didn't even have the time to realize what was going on until it was stuck in the orbs attraction field.
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Nagato was able to make one
through the Deva Path (it has been stated that he uses the path techniques on a faster and a stronger scale) and the Kyuubi barely had time to react before it was crushed. The Sannin may have knowledge, but the technique would be up in such short time, that they wouldn't be able to react accordingly. The sphere wasn't even completed, and yet a TBB from the Kyuubi (obviously not in his complete form, but still considerably powerful) didn't even scratch it. Even if they're able to react in time, they don't have the firepower to destroy it
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Nagato could use a Shinra Tensei to make the Sannin lose their balance, and could make a Chibaku and shoot it up before they'd even be back on their feet, and the match is his. People who say that it takes time to create are simply wrong...