For Wins and SV%.

Driedger - likely 2 games, on the road.
Lankinen - likely at least 2, maybe all 3 home games BUT 1 vs TB and 2 vs FLA.

Driedger is confirmed for tonight and will likely play 2 games this week, one @NAS and another @CHI. Coach Q has already stated that after that one game Knight played, he's going back to the Bob/Driedger rotation so it doesn't look like Knight is in the picture.
Florida is a much better team than Chicago and Driedger has the better stats.

However, Lankinen has a very good home record (.921 SV% at home vs .898 SV% on the road) and he is due for a bounceback (or is he?). Last time I benched him when he played Florida at home, he won both games including one SO.
I know Subban has been getting starts lately but with him not playing well last game, I'm almost certain Lankinen starts next game.