Agree with putting your numbers into fireCalc. You have:
$300,000 in taxable account
$800,000 in inherited IRA
$600,000 in 401(k)/IRA
$11,000/yr in non-COLA pension
$25,000/yr in non-COLA pension starting in 2031.
Using the 4% withdrawal convention, you should be able to withdrawal $68,000...