My main target would be resigning Bo or going after Bregman. Wouldn't surprise me if Springer plays a roll in pursuing Bregman.
If $400M is being thrown around for Kyle Tucker, would pass. Think Bellinger would be a better option at a fraction of the cost and could also play CF.
Would consider signing Varsho to an extension, depending on his health. Think you can lock him up for the next 4-5 years at a reasonable, below market value contract. Kind of like what the Jays did with Kirk.
If the Jays struck out on both Bo and Bregman, I think Kim wouldn't be that bad of an option. If he's healthy, should be good for around 3 WAR, 15 HR's, and probably 30 steals.