You can block with a Mishra's Factory and use it to pump itself.
You can activate an Orchard on your opponents end step so they don't get an attacker the turn before you Oath.
(not explicitly vintage) +ing a planeswalker is a cost, so you can cast a Jace and + it if you think it will get bolted.
This plays out as you cast a Jace TMS, hold priority +2 it then pass priority. They then bolt it. Now your Jace is alive, at 2 loyalty and at that point the fateseal resolves.
I'll keep adding to this thread.