Personally, I think targeting an RD could be wise. In the system now, we have: Makar...set for as long as we can pay him; EJ...getting long in the tooth, may be a buyout candidate come expansion draft time; Timmins...could be great, should be great, might be one hit from retirement; Helleson...could turn out solid, many are skeptical; Clurman...still a long shot; and that is it. Oh yeah, Mark Alt. Not sure we count him as more than a emergency call up. So right now, we have TWO NHL level RDs, one of which may not last much longer. Then we have a prospect that seems to have the skill, but may not be durable. Another prospect that we hope has the skill, but many think he doesn't. And one that most of us think is AHL bound at best. Say Timmins stays healthy. Great, he can replace EJ. And who is our RD3? None of the others are sure bets, so we need to take another one with a high enough pick to have a decent chance of being an NHLer. And in the not-rare chance that none of them can step into that 2RD role...we have a huge hole.
IMO, right D is the hardest position in hockey to fill in trade/FA (if you want quality). Overall...yes, 1G or 1C can be harder....but I would argue that 1RD is hardest, and 3RD is harder than 3G or 3C. Luckily, we have a 1C, and a 1RD. And potentially a couple 1LDs, though our 2/3LDs might be pricing themselves off the team, or aging out, so getting a solid pipeline there would be good too.
I get the desire for a top6 winger. Either a sniper, or a banger with enough skill to hang in that role. But it is easier to fill that role through other means, and even later in the draft, we can take flyers on high risk/reward guys to fill out the forward lines. Defense needs to be a bit more certain, I feel.