Can you explain what the +/- indicates? As for blocks, Parry should be a silver card. Surging Shield block would be fair at Bronze, and Stuck Arrow at paper. Cause Fumble might be Bronze. Most of the Gold quality blocks could be silver as well. I mean, Hard To Pin Down, Icy Block, Desperate Block, are all pretty fair Silver. But Acrobatic Flip, Absorbing Block, and Defender's Block are all rather mediocre in function compared to lower quality cards.
Per the reverse engineering thread: This is correct, with some modifications (though I'm using Tar and Amethyst for the first and last materials). The official card list uses 5 columns to describe quality: (columns AL-AP/38-42) Plus Minus: adds/subtracts 1 from the level Quality: quality shown on the card, used for Human and Dwarf Skills (but not Elf) Quality Warrior: quality used for Heavy Armor, Helmet, Martial, and Weapon Quality Priest: all Divine slots, and Shield Quality Wizard: Arcane slots, Elf Skill, Robes, and Staff (If I set Boots to card quality, the ones with Hard to Pin Down and/or Fright do not fit the formula. If I assign them to any of the classes, lots more boots fail.) For my tables, I only showed the card quality, not the class based qualities (most cards are the same for all). I included the plus/minus because it was fairly easy to do so. If you're going to poke around in the .csv file, note that E=Tar, B=Silver, and AAA=Amethyst (because things weren't complicated enough as is).
It seems Hard To Pin Down is valued as 9 for boots, and Fright as 0 instead of -3. There must be some data in the API that explains this.
Yeah, that's the wizard value for the first and the priest value for the second. The rule could be "boots use highest value of any class", but I'd have to make the formula about twice as long to test it.