This sounds like a fairly routine spreadsheet exercise... beginning IRA balances, plus market change at some RoR assumption, minus pre-RMD WDs, minus RMDs (using IRS factors), equals ending balance. One row for each year. For us, it would also include Roth conversions.
As others have mentioned, the much harder part is predicting growth and future tax rates and then optimizing all this with the rest of your withdrawal strategy and decisions (like when to take SS). After lots of analysis, and even considering the one-spouse-dies-early scenario, I've decided not to convert beyond the top of the 12% bracket.
So regarding RMDs, at this point... it is what it is. If the market is generous, I'll happily pay my tax. If the market is a trainwreck, I'll be happy I didn't convert into the 22% bracket. I'm happy either way.