Plasma is great I have one and use more for intricate cutting or cut curves. Sometimes straight really depends on the end product. With post cleaning the slag and most likely blending a saw cut or ripples I would lean towards a cutoff wheel. Once you’ve cut your edge its done besides rounding your sharp edges. Plasma you gonna have to dress the cut with the grinder.
To answer your question on plasma tips. Try not to stop/start the cut. I always bump the amps for stainless. Go as fast as you can while maintaining good cut quality, be steady, and air quality is important so a dryer of sort is worth its weight. Good luck!