The 2 mana resu a random minion might seem strong but it’s not actually. I actually cut that from my wild resu priest because if you hit something you don’t want you’ll just creater another copy of a not so good minion (even more so when the opponent has tech cards vs you like giving you crappy 1 drops), I’d rather add another hard aoe removal instead of that. The 4 mana is twice or 3 times as good not only because you get to pick but you also create another copy of that minion. Vargoth is indeed rly strong in resu priest and you mostly insta win if you play him on 4 unless they can hex, silence or steal him.
it depends on your deck: if you play big priest, the only bad minion you can ress is barnes.