It depends. I like to leave things alone, thinking if the engine ran well last time, it will run well this time. So I like to leave the compression set on the running setting, and same for NVA. Generally, I have found running compression to be lower than quck and easy flip starting setting. I figure a hydraulic lock is unlikely at running setting. What I will do is squirt some fuel on the side of the piston, choke once, and flip a couple of times. Occasionally that is all it takes. If not, I have cleared things so no hydrolock. Give it two or three seconds on the starter and that is usually all it takes. The engine will run undercompressed until I am ready take off, at which time it is warmed up and ready to run to suit me.

I don't use a starter on all diesels, as I have several which start readily and I can duplicate the running compression fairly easily.