Oh my god, why is everybody retarded.
If your running the echo pads on a smooth rim;
1. Its a crap brake unless your streety (streety as in Shrewers), but I'm guessing by your choice of rim that thats not the case... So this would point the answer towards changing brake set-up.
2. If they are wearing down 1mm a ride, chances are you got a dodgy set. The wear rate is bad, but not bad enough to wear that much on a smooth rim. Which would also point the answer towards changing brake set-up.
Answer - Get some proper pads. In any other circumstances I'd say get a grind, but with a DOB rim thats chucking money down the drain really.
Encase you didn't know - DOB rims have a reputation for grinding up badly and not holding the grind. Therefore meaning 'one' has to grind one's rim more often, therefore shortening the rim life because it'll be more prone to flat spotting, AAAnd the rim life for this particular type of rim is rather short regardless.
Edit: Classifying retardedness (and otherwise going in for the kill) in an attempt to avoid argument/repercussions -
Well, no. If you actually read the post, the problem is in them being too soft. Which, having used them, I can safely say they are.
Again, this is where all the reading practice you do at school comes in handy - it says 'smooth rim'