Okay Selled, here’s the plan. Try some bigger discs, 203mm rotors front and rear, with some sintered pads and some castrol srf fluid.
Sintered pads dump less heat into the rotor, so you won’t melt them as easily. The downside as I said is that they dump heat into the brake fluid, which is where some Castrol SRF or Motul 600 race fluid is useful. These fluids (especially srf) have much higher dry and wet boiling temps than standard dot 4 or dot 5.1.
Whilst sintered are less grabby, they are more resistant to brake fade (aka work better at higher temp).
If you are still having problems, then upgrade to a new formula brake such as the an RO or The One….the bigger calliper should dissapate heat better and the bigger pads shouldn’t wear as quicky…. you could swap the new brakes onto your new rotors!
http://www.pinkbike.com/news/brake-pad-information-2009.html