1) Strome
2) If Panarin were on the block, I think he'd probably fetch the typical roster player (2-3rd liner or 2D), offensive prospect, defensive prospect, 1st that seems to be the standard when any big named player is traded. That being said, his value is probably lower due to his contract and the fact that nobody could take it on. If the Rangers retained, the value would skyrocket.
So in that regard, if we were to trade Panarin, I'd expect about what we got for McDonagh, which is about what Buffalo will get for Eichel.
I don't know other teams assets, so I'll use NYR, If the Rangers were trading for Panarin, I think it would look something like
Strome/ Buch
Kravtsov
Jones / Reunanen / Hajek
1st