I think if you're going to drop a pretty penny on tickets, I'd rather have that guarantee that StubHub or Vivid Seats offer. It will state when purchasing your tickets the row and the seat numbers. Unless you're buying 2 tickets in a block of 4 or 6 seats etc, you might not find out the exact seats until after the purchase, though your seats will be together regardless. Prices are quite high right now and like I said there are so many tickets available. You might be able to luck out and find a deal like burlingtonbandit did tonight on Stubhub for a cheap 100 level seat if you're checking every hour. Theres no harm in being patient and waiting closer to the date. Tickets that sellers don't move will come down in price as the date gets closer. If there was a limited market on Stubhub for tickets right now, then thats another story.
I managed to grab a single for Game 1 in 113A, two scattered seats in 516 for Game 2 and another 500 level seat for Game 3 on the Blue Jays website. Also, I have a pair for one game per series via the person I bought my flex pack through, though I don't know which game yet I'll get. So I'll likely have some extra tickets available to sell for one of the games in the ALDS (possibly that pair I get) and for sure for Game 2.