Well, there is too much uncertainty right now to truly do anything significant. I'm just talking about a 5th round pick for a proven NHL bottom-pair RD, as an insurance policy.
But we don't have enough info here in the peanut gallery. A lot to me depends on Myers. Since we have no idea whatsoever what's going on with him... IF the only thing is the coaching staff working with him, we don't even know what they think his status might be.... is he "almost there", "nowhere close", "he'll never get there", etc. Or there's something else wrong that we have no idea about. We don't know if Tennyson can really hold up. We don't know if Fabbro/Carrier are injured by the end of March or not.
But I think what I'd be doing as a GM is laying my contingency plans NOW. Watch some of those players who might be target candidates. Maybe even touch base with their GMs about the cost. And if it turned out somebody was cheap enough right away, it couldn't hurt to lay down that 5th even if it turned out not to be necessary. But more likely keep monitoring the situation up to March 21.
There's no total urgency just yet. But prices likely aren't going down over the next 8 weeks. If a cheap enough insurance policy presented itself, I'd consider it.