Good effort OP.
I prefer the following:
Two w/Toronto
A.
Staal, 5.7 x 2 = 2.85 for Marleau, 6.25 expiring
instant cap relief for Leafs w/Staal able to be bought out cheap
trade him at half and cap hit is minuscule 1.425
Rangers can hold onto Marleau as a useful stopgap, or if he prefers, deal him as an expiring rental
cap dif is min 6.25 - 2.85 = 3.4 instant minimal relief to Leafs, with options for more cap savings
B.
Georgiev .7925m expiring elc + Strome 3.1 expiring
total cap is ballpark 3.8925+
for
Nylander 6.9 - 3.8925 = another 3.1-ish instant cap for Leafs
total cap relief to TOR both deals = 3.1 + 3.4 instant immediate cap savings
with more cap recovery possible depending on if/when/how Staal moved/bought out, etc.
Analysis:
Leafs might get lucky, but do not seem to have enough netminder quality to win it all. Georgiev totally stoned them, has emerged, and on an elc, so he is cost controlled for the immediate future. If all things were equal, Rangers, making room for Shesty to join Hank, should deal him out of conference. Thus, Leafs have to step up with return.
Strome (finally found game with NYR) is a good stopgap w/potential
A huge consideration, obviously, is the cap space needed to make Marner a happy camper; this deal achieves that, Leafs effectively repurpose star quality F into need area G, with some depth.
They can use Fast, but not sure his value is appreciated, so let's keep him.
I would consider something like a 2023 3rd which can be upgraded into two 2nds IF Nylander:
is available to play X number of games for NYR
hits certain production targets [points, +/-, etc]
Rangers repurpose depth for righty F add.
Marleau can be dealt to club of his choice as a friendly rental if nec to have him waive nmc. However, there is a chance we are in good shape if we get a few breaks, and he may be good with that ride.
Get rid of excess vet depth
sign Panarin, get Hayes back at decent term + $
deal Namest at half + NYR 2019 2nd + TB 2nd for TB 1st
deal Zib + Vesey + later pick for Hanifin + Ras Andersson + CAL 1st
deal Lias, Howden + Deangelo for Buf 2019 = 7OA, St.L 2020 1st + 2 prospects
deal Buch + for 8OA
dump Smith
Kakko - Kravtsov - Panarin
Kreider - Nieves - Nylander
Chytil - Hayes - Marleau
Lemieux - Gettinger - Fast
LD: Hanifin-Hajek-Lindgren-Rykov-Claesson
RD: R Andersson, Shattenkirk
EK a one year stopgap, hangs with Hank?
G: Hank, Shesty
Why would Marleau not want to get in on that?