Many of the issues with SS on the DNA 200 have been resolved with the latest firmware. All I run is SS316L on DNA 200 & DNA 75's and love it. There are better wire's for TC but SS is the least expensive and most readily available.
SS has a low TCR so, it's taking the mod manufacturers awhile to perfect. Not quite there but Evolv has come a long way and I suspect, done a much better job than other manufacturers.
Don't give up on SS, yet!