It's pretty fun to have two of the best goalies in the league so we can have these discussions. I've gone back and forth, but if I were coahc, I would definitely go with Swayman due to the likelihood that he's in Leaf's heads a bit, is playing ice-blood-veins hockey, and gets the extra day of rest. Also, you KNOW he wants back in so badly, and will stop shots with his crotch if he needs to. I'd sit down with Linus and be like: "Man, I know I told you we would rotate....and I know you're solid, but for the best chance to win I'm going with Swayman tomorrow because I want to ride that mojo".
Having said that, I'm fine if they decide to rotate Ullmark in. He is an excellent tender, and played a great game two. Also, If he is in, it provides some fascinating discussion possibilities depending on how the game goes (how do the guys play in front of him, what does it do to the Leafs if Ullmark shuts the door...knowing they get to play Swayman in Boston down 3-1. Or how does it affect the B's if Ullmark loses and heading back to Boston with the series tied up again).
What fun. I love the playoffs.