Drafting Patrick Laine (RW) or Jesse Puljujarvi (RW) may be the easiest way to fill the hole for many years. Even if we end up 4th-6th range I think Treliving has the ammunition to be able to try and aggressively trade up to get one of them. And no matter where we'll finish we'll have some chance of winning one of those 3 lotteries.
As for UFAs I have varying degrees of interest in Stamkos, Backes, Eriksson, Okposo, Boedker, McGinn, Brouwer, Lucic, Perron, Jagr. I doubt Doan is going anywhere. Treliving may need to deal with some salary (Wideman, Raymond) in order to take a big run at any of those guys.
IMO ask this question again after the draft lottery and we may have a better idea of the answer