Out of the seven you've listed. First out would be Revealer, I don't see that it helps site lock that much, and defense comes first. The next one out would be speed bump. Speed bump would be in your site before they attack, so they'll know to be under 10 each attack. If speed bump is high on your list to keep, next one out would be the hand discard. I would rank hand discard lower than deck discard because they choose what their lowest card is in their hand. The deck discard might end up being a great card.
Daniel
