Knowing the Sens, they will wait for the next year's deadline and deal him for peanuts.
The right side is difficult to figure out while there are many options for a 2nd pair LHD.
If the Leafs use their capspace in free agency, they should be able to get one decent top 4 D. The question is who do you prioritize. A top level D who can cost 7+M or a mid-level one that costs you 4-5 M per year. And the expensive ones are mostly LHD.
If I had a crack at it, I probably drop 6x6 or 6M x7 on Forsling if need be, I know it's a LD but he's playing top pairing in Florida or at worst, he's an elite #3 for us.
The RD I feel is going to be Tanev, Treliving just seems to want to him and there is an absence of top end RD in UFA.
In 2025 it is not much better, RD are Ekblad, Burns, Petry, Poink, Theodore (LD that plays RD), Larsson, Rutta and basically yea they're all getting older and don't really help.
We're likely going to need to overpay and try via trade, I am definitely going to advocate for us selling pieces if we start to fall out of the race so we can have either picks or interesting prospects to jump on any top end RD that becomes available. The last RD we could have acquired that's a legit top guy was Pietrangelo and we missed the chance, no one has really become available since.