Galadriel's power

[Inziladun]

Originally Posted by Gorthaur the Cruel

Could Sauron's slow reanimation of a new body also due to the loss of Ring? I believe he would have regenerated just as quickly if he had the Ring in his posession (no matter how many times his body gets killed). It may be that the Ainur can deplete their innate powers by doing such things, but Sauron found his loophole: One Ring. As long as he has it, the Ring would give him sort of like infinite magic points to spend (thus avoiding being utterly weakened like Morgoth).

I think you may have something there. According to The Tale of Years the Downfall of Númenor, apparently the first example of Sauron's loss of body, occurred in S.A 3319. By 3429 Sauron was already launching attacks against Gondor, indicating to me a return to full strength.
As a contrast, after his defeat by the Last Alliance and loss of the Ring, it took over a thousand years for him to begin to grow to even a minor threat to the West again, with his occupation of Dol Guldur as the Necromancer, and over 1900 years before he declared himself in Mordor.
It appears from at least circumstantial evidence that the Ring may indeed have been a factor in his rebodiment.