Go back to my first post. Cooldown on the sprite skill is merely a vanity thing. Having just to have. I'm not going to spam quills everytime it's off cooldown. I could see a reason for it if you took the speed buff on drakon, the aoe shield on sera, or the cloak. But in those situations where you're going to spam those skills, you really won't be able to use it that many more times. 10% cuts something like 4 seconds off the longest cooldown.

If you really want a harness, take the 3 damage types so you can deal a tad bit more damage against enemies. And even then that's debatable. Seraph damage is pitiful. Mask's only damage skill would be the hexing haze, which might actually work really well with typed harnesses. And from what I hear, most of drakon's damage comes from the fire status, not the initial damage of a spell.

Yea basically, harnesses are the cosmetics of sprites that don't even show up well. I bought mine because I made a killing selling divine food during the first week of sprites.