I would run it bog standard. Use the nozzle it ships with, or add a simple brass one and assemble it with care.

Once you have it working, it will probably work a long time.

I have a CR-10 machine mostly running PLA, HIPS and PETG. I never change anything.

The secret is warm up hot end, push filament through by hand, until flow is straight and clean. Then print.

On material change, I do it hot. Pull one, insert the other, push by hand until flow is good.