Seek out the Halak owner and dangle Elliott. He should want the handcuff and your goalies are otherwise good enough to handle losing Elliott. It might leave you thin in terms of depth but that's a risk you run even with Elliott.
I might seek to cash in some of your youngsters as well. The post World Juniors hype on Galchenyuk seems pretty substantial and that could carry for Strome as well as Grigorenko and certainly Hamilton. You've got a lot of young talent on this team but odds are half of your prospects won't reach your expectations so I would recommend cashing them in.