Pittsburgh would be foolish to accept this trade. Too little return. I would counter....
Remove Guentzel, and add Chucky,, Mete, and Juulson, then we can talk.
Any Letang trade would be pure fantasy at this point unless the offer is too ridiculous not to accept

Yeah PIT would not go for this. Also, this still leaves MON the worst team in the NHL up the middle.

Wow.... really ? You get Pacioretty to play with either Crosby and Malkin so he can finally hit the 40 goal mark. You get a top 4 offensive D, a 3rd line consistent but old center, a 2nd and weird prospect ( I agree.. weird). And MTL gets what? A Quebec native now overrated D with commotions problems... Guentzel is good, but he has no center in MTL to play with, and Sheary is not so special. Oh.. and thank you for .. Ian Cole ? MTL lose this one big... unless Letang really gets it back. 'Cause if he's so good, why would you want trade him then?
Pacioretty HAS to be traded for a center.

It’s not a good trade for either team.
If PIT wants plecky.... maybe a second round pic.
If MTL wants letang.... it’s goung to cost serious assets as he is too valuable to pens right now.... and pens window is right now.
Guentzel is not going anywhere right now. Cost controlled asset with high upside.
Cole... maybe a second round pick.

MTL should look for a team like Ottawa that has an abundance of centers to trade. Pit needs a reliable 3c.