I wouldn't protect a UFA at all, so I wouldn't protect Armia, Tatar and Danault (unless they're re-signed). I'd protect Lehky as he's a RFA and a solid bottom-6 player, and also Evans. They can't take the 3 of them so I'd be willing to take a chance. And even if Seattle claims one of them, we can always sign them during free agency.
I'd even be willing to trade a pick/a lower tier prospect so Seattle would take Byron. Or I'd leave Drouin exposed as a bait as he's too soft for this team (he has been playing harder than the prior years, but he still looks like the odd man out to me). Anyway we should definitely protect Evans and use this opportunity to shed some $ off the cap.