Grimrock

Nice! There's a little flaw, though. You compare a 4-pieces set with a 5-pieces set... but a normal player won't just go around without wearing gloves with his lurker set. At least you've taken the shield off the valor set :p. Nice work overall anyway. Ah, yeah, I had meant to mention that as well ...

The Short Version: If you're sticking with Light armor and want to know whether the Lurker set or Chitin set is best in terms of withstanding attacks: it's the Lurker set. If you're willing to put some points into Heavy armor, Plate or Valor will perform better than Lurker. Point-for-point, Evasion...