With regard to your power plan I think the balanced plan you have is good for all round performance. The AMD special plans can be useful if you want to force certain conditions such as the high performance plan will will prevent the CPU from going into low power mode and ensures the Ryzen settings are optimised. However, I think you have the best setting.
The latest crash can only be analysed properly with the memory.dmp file. If you can share that one it will help me to provide the analysis.