Accelerating Regeneration

How good is Accelerating Regeneration?

How powerful is a person with Accelerating Regeneration and Mentifery?

What would Absolute-level Accelerating Regeneration be like? Yes, I know that's just Absolute Regeneration, but please, humor me. Bonus Question: Someone has Accelerating Regeneration and Adaptive Regeneration.

Is there any power on here that fits the title accelerating development? with it basically being Accelerated Development but with each instance of development making their development faster and easier, like Accelerating Healing Factor. Accelerated Development makes its user develop fast, but doesn't get any faster, Adaptive Development is insanely fast, but it eventually slows down without a challenge, but accelerating development would just continue getting faster and faster. an example would be if a user developed to x2 their starting point in 1 day, next they can do it in half the time needed only needing 12 hours, then 6 hours, then 3 hours, then 1 hour 30 mins, continuing infinitely.

Saitama would probably fit, with him constantly outclassing his previous self, even tho it took him years to get to that point, even with the amount of effort and time put into developing being less and less.

I got this thought when I made my previous post about endless development possibly developing their own development, making their development rate faster the more they develop.