Been in the biz for 10+ years, I am installing a new R410A for my own house would putting a liquid solenoid on and letting it go into pumpdown mode when the thermostat satisfies would allow the compressor an easier time on startup thus allowing for less wear and tear on the compressor? Or would installing a crankcase regulator on the suction line be a better way?

It's a Copeland Scroll compressor, I forgot if did or didn't matter if the scroll is under equalized pressures it would startup the same. That scroll would startup the same whether equalized or not.

Thanks for your input!