While I still don't think it's likely, let's assume Stamkos is willing to come if Murray promises to make moves this season. Let's say 10x7.
So we trade all of our pending UFAs or let them walk. It would open around 10 million cap space.
We extend Risto with long-term 6 million and Girgs with long-term 3,5 million. McCabe gets 1 million 1-2 years bridge. We draft whoever we can in top-10 (won't be a factor next season).
Then you go after Enström and offer a package that could include 1st rounder 2017. You also try to get rid of Franson, Gorges and Ennis. You try to package them for Enström, and if you can't, you try to get them elsewhere. Then, with clearly upgraded roster, you offer Brian Campbell 2 years deal with whatever salary he is willing to take.
Next season:
Kane (5,3) - Stamkos (10) - Reinhart (1)¨
ROR (7,5) - Eichel (1) - Girgs (3,5)
Foligno (2,5) - Larsson (1,5) - Gionta (4,25)
Des (1) - Schaller (1) - x(1)
Moulson (5), x (1)
45,55 mill.
Enström (5,75) - Risto (6)
Campbell (4,5) - Bogo (5,1)
McCabe (1) - Pysyk (1,1)
x (1)
24,45 mill
Lehner (2,25)
x (1)
3,25 mill
= 73,25
That's over today's cap, but you could tweak the numbers a bit. Or some of the players (Foligno/Larsson) could be a part of the Enström deal and replaced by players like Carrier/Bailey/Fasching.
Overall, that would give us (imo) a fairly competitive roster starting from next year, while giving us some time to figure out the LHD situation. When the contracts of Eichel and Reinhart are expiring, you get Kane, Campbell and Enström expiring as well. It would give you 15 millions, and by that time you could have younger options ready to replace the vets and you could let Kane walks/trade if is the smartest move. And you also could buy-out Moulson and Gionta wouldn't be on your books either. Sure, some guys will get raises along the way, but you replace them with guys coming from the pipeline if they become too expensive.
That's far from being a realistic scenario with so many moving parts, but I just wanted to illustrate that to get Stamkos we would have to be quite competitive from the get-go and if we get Stamkos we could be.