For me the top ones are:
2nd Cardback is amazing
the female Avatar chick is awesome
Glorious Warrior Alternate Art is pretty nice. He's being shot at by an Overseers dude!
1st Cardback, is that an Ascension one re-released? Looks too much like Ascension cardbacks.
2nd Avatar, kinda looks too drawn by microsoft Paint feel to it. I dunno, I just not a big fan of it.
Banish Alternate Art, the face looks like clay, there are no eyes, and the hair on the right side looks like it's growing out of his right eye.