I was wondering if people would prefer Duck or Toughness with the current gold card-heavy, penetrating-heavy meta. It seems much more tempting to use Duck for that 50% chance to return a Fireball, Radiation Bomb, or Laser Thrust, with the failing 50% make it difficult for the enemy to target you.
You already know my answer, pal~ I like Duck. It adds a certain... uncertainty. It's not weak, not OP, but... it allows you to play the RNG game to the fullest.
Toughness every time. Guaranteed card draw (besides those rare boiling armor/sundering strike), and id rather draw my cards than my opponents.