I don't follow any withdrawal rule. I withdraw what I need when I need it, though I plan for expenses so I am not forced to liquidate an asset I don't want to liquidate.
Before I retired, I looked at my annual expenditures, being an anal CPA, I had detailed tracking of my expenses. Put in an allocation for travel. Look at projected SSI for my wife and I. Ran all this out for 30 years adjusting for projected inflation. I looked at the shortage SSI from Expenses. From there I looked at my assets and figure out what growth I need on those assets for my money to last. Figured I needed a 4% return, so I retired. Been retired for 2 and half years and up to this time I actually have more money than when I retired because my ROI has been much greater than 4%.
As to the mix, I originally had a more balanced mix with bonds, but as I have liquidate those assets, I have tended to be heavier in stocks. A financial planner might say I have let it go too far that way and I have consider reallocating but haven't taken the step.