Horrible for the leafs

Nope

Make it Kylington instead of Mackey with no retention on Nylander and it might work for Calgary but Toronto probably wouldn't do it. Leafs fans will hate it.

Just don't see TOR being interested in any more LD's though. Maybe add Ruzicka and they send Sandin back?

TOR has to do something to get under the Cap, so whether they pay to move Kerfoot, Holl or Muzzin or Trade away Nylander, TOR Fans likely won't be happy with any solution

Horrible trade for the Leafs to be honest. I’d love Flames to have a Nylander come home but that is definitely not the price

Yeah, I see it being more like Toffoli + Dube for Nylander, but as a Flames Fan, I wouldn't want to do that.

MoxNix's idea of Kylington + Dube + Valimaki isn't bad, but TOR has no real need for LD's, so unless Ruzicka or a 2nd + Jack Beck was included with Rasmus Sandin coming back to CGY as well, I don't see them doing it. Giordano could split time with Valimaki at 3RD though:

Reilly-Brodie
Kylington-Liljegren
Muzzin-Giordano/Valimaki

Holl (or Muzzin) would need to be moved/dumped in this case or again, TOR simply doesn't need Valimaki, as they could bring up Benn or Mete to be 7th D-Man (both won't be as good, but they're 1/2 the price), so again it goes back to Toffoli + Dube making the most sense