Robertson nets a 2nd but Calgary retaining on 2 players nets a 1rst 2nd 3rd, 4th line prospect and 2 UFA’s.

Calgary declines

Robertson trade makes little sense, better to just send him down to the Marlies and retain a bit of depth. A 2nd and 5th would be 5 to 6 years away and even then would only have about a 40% chance of being equal to Robertson.

Markstrom or Samsonov? Sort of six of one or half dozen of the other. I can't really say the Leafs would be better off either way, so something not really worth doing.
Tanev would be a good add as we all know, but the trade as presented here likely does not work.

I think it would be a straight 1st for Tanev with 1.5m to 2m retained, to start. Calgary might want more but so far no one else has met that price. Minten is not worth giving up to rent Tanev. Dumba would likely do in place of Tanev and I think the Leafs could get him without giving up one of the few good prospects the Leafs have.

leafs don't need to sell the house for 3 years of markstrom. Woll is developing great

I think a lot of these would depend on Markstrom and whether the Flames wanted out of his contract.
Tanev is gone so if they got a 1st and a prospect and had to retain some cap hit it would not be an issue. Not much salary is owed.
The deal presented here is not good for the Leafs. No real need to factor in Markstrom and Minten is one of the few good prospect the Leafs have. Also Tanev is not worth a 1st but Calgary might get it.

CGY doesn’t wanna retain on Markstrom. if they did he’d be a devil already

Jones isn’t even worth that.