I'd say highest to lowest:
1. Volified - I know you play WK a lot, so just going off what you play.
2. True Retear - He's good if you have the right cards, as you said cards such as Marduk, Star Dragon, Vet Paladin. If you got them, go for them.
3. Proxy - Right now I think Jewel of the Sea > Mermaid Observer is a stronger opening since it lets you access the first SS earlier. Also immune to turn 1 shade.
4. Pimp Hand - You only have 1, so he's better as an SS. Could use it with Joachim/Unwanted Charity or that big EX red creature that's soul immune.