They are of course as good as card advantage gets, but it would be an insult to them to even try to rank them among cards outside this elite group
You can have a sacrifice outlet and a landfall enabler in the same creature, and the more creatures you sacrifice, the stronger Wight becomes
Queen is immense on defense but it is no where near the game ending power or speed of Avenger
It's only a 5-drop and won't trigger Runo's transform, and you will only counter an artifact or a dork, not someone trying to kill your stuff with instants and sorceries
Two mana to dig five cards deep for a permanent is a fine rate if that's something your deck is interested in, although putting the extra cards back into your library rather than into your graveyard means this won't be a replacement for Grisly Salvage
To tell apart a fake Pokmon TCG card from a real one, five criteria can be assessed