Another option is to raise damage resistance:
making liquefaction/vaporization temperature much higher,
reduce the material resistance,
distributing the effect over higher area,
making temperature distribution more instant.
So the technical approacher I see are:
1)changing the material,
2)making it less thin,
3)super-cool the blade-edge down to superconducting temperature to distribute temperature instantly make vaporization harder due to low temperature and reduce the electrical resistance,
4)spin the blade edge at a high speed to make distribution more even.
I would go with
1)Material to nickel-iron, chromium, yttrium, iridium, platinum, tungsten, or palladium 2) see if you can reduce the thinning of the edge
leaving 3,4 to better funded stages