1. The kuuybi has a physical form (Proven and Closed)
2. Just because half of the chakara from the Nine tails was sealed, does not indicate that it cannot generate. Kabuto was still able to help Oro use his jutsus by using Oro arms which was sealed. (Debate)
3. The Kuuybi is SEALED in Naruto, yet he was able to reform in the fight against pain, isn't it plausible that he was able to regenerate his chakara regardless having it sealed?
4. Lets say if his "Chakara" is cut in half, He is still powerful without naruto, powerful enough to beat the other tailed beast.
By your logic, kurama would be ranked as so: 1,2,3,4,(9),5,6,7,8 making him a (4.5)
However that 4.5 + x equaled out tails powers of tailed 2,3,4,5,6, and 7 beasts. (Closed)
let x = naruto
2+3+4+5+6+7 = 32
4.5 + x = 32
x = 27.5
Naruto = 27.5
27.5 > 4.5 (which means Naruto can beat kurama with ease) WRONG
27.5 > 2+3+4+6+7 (which means Naruto can beat all those other tailed beast COMBINED) WRONG
Are you telling me naruto can single 2,3,4,6, and 7 tailed beasts and WIN? Sorry, But no
SO BY CONCLUSION, even with his power cut in half, and without naruto's help he can beat the other tailed beast. If that wasnt the case then naruto would beable to single the other beast ALONE which isnt the case. Case CLOSED