Can't rule out the Blue Jays doing anything, I would save Gausman and Yesavage for a potential game 5. I think you have a better chance to win with them together then them apart because now you're relying on your bullpen in two games instead of mainly this one. Gausman I'm pretty sure I've heard or read that he doesn't like to pitch on short rest. He prefers long rest.
I think you try to win the bullpen game and if it doesn't work, you have a great combination available for game 5.