First off, what qualifies as a rookie keeper for you?
With your goalie situation, I would be all over him.
Lehner straight up. Varly straight up. Either of those would be winners for you. As for skater values, Drouin or Rielly is about where I would start, but to get him you would likely have to part with Pasta+. Your skaters seem to be either just too good to want to deal for Helle, or just not good enough.