What do ou mean by too much pressure?
Yes, withdrawing $80k from a $1M is 8% of that account; when this bucket alone is considered, it seems dangerous. But, your 401k/IRA will still be growing. So, as you draw down your brokerage, your wealth will continue to grow.
And, if you're lucky, it might not draw down, anyway. The long-term market average growth is 10%. If you had 100% stocks in your brokerage, you might even sustain growth through this. Of course, you would also be subject to the risks of a market downturn. Since this is the money you know you will be withdrawing from, you may want to carry some bonds / CD's / fixed rate investments. This will make it more likely (on average) that you will be spending down this account, but will make it more predictable.
I am in the 5th year of exactly this strategy. Given the market's history since 2020, even with the downturn in early 2020 and 2022, my account has been growing even as I take out expenses. This was not my plan, but it's a pleasant surprise. I am 100% in stocks, but I also carry a hefty year-plus emergency fund, which I can tap in case of a down market. (Like the summer of '22)
Also, when thinking about your withdrawals, remember that they will be long-term capital gains. You say "we," so as MFJ you can take $89k in gains at 0%. Plus your standard deduction. And that's not the withdrawal, just the gain. So, if you have taxes in your budget, this can be a time much like withdrawing from Roths, with low or no income tax.