I think Mercer will end up on the wing anyway, just because he belongs in the top 6 and has shown chemistry with Bratt, Hughes, and Hischier at different points this season. Shifting him to wing makes more sense than putting him on the third line.
If Wright drops to 2 and Slafkovsky is available, I could see a scenario where we try to get assets out of Arizona to let them draft Wright, then take Slafkovsky. Or we could just take Wright and sort out our future ice time problems at a later date.
I think that's unlikely though. Montreal is probably going to take Wright, and if they don't, it will be because they took Slafkovsky.
The odds are low that we will be making a decision between Wright and Slafkovsky at 2, so essentially Montreal is making our pick for us.