I’ve never done the monthly transfers, only the embassy affidavit.
This last time I renewed, I started what you are planning, the simultaneous method.
I had the 800k in the bank, seasoned for over two months, but didn’t show it. I used the embassy letter.
So next time I renew, I will have both options, the letter OR the affidavit.
But… I want to spend some of the 800k for a couple of months, and it’s not past the three months since renewal Aug 4th, even though I didn’t use 800k method to renew.
So if it drops a little bit below 800k it would violate the 3 month after rule, but I didn’t use it for this renewal, I hope to use it for next one, which theoretically would be only 2 months.