Need help in first cut for power settings

I never run my diode at 100%, the highest I have been is 85%, I hope this will mean my laser will last longer, time will tell !
For info, I always run a material test (found in the laser tools dropdown) prior to using any new material it is a tad time consuming but well worth it in the long run.
When cutting I also prefer to use the highest speed lowest power possible and run at least a couple of passes.
At the end of the day it is down to trial and error, also keep notes and build up the material library.
For info, my setting for 3mm Birch ply on my 7W output diode is 300mm/m at 85% power and 2 passes (sometimes 3) with air assist