Brake pads or rotors for mud

I know this has been discussed before but Id like to see what yall think. About 90 percent of the time I ride, i ride in mud, water, sand, and clay. I replaced all 4 pads at about 400 miles and just realized today that I am well overdue for a pad change at 1000 miles. I replaced the pads with race driven ones the first time. From what I have read on hear, there is really nothing to improve pad life if you ride in almost strictly muddy conditions. I am probably going to buy Race driven pads again, but i noticed they now have rotors designed for mud riding. Has anyone ran these yet? They are $36 a piece