Stud mount rocker arm question

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some rockers, like the comp magnum roller tips use just a lock nut.

rockers that provide poly locks: use them-that's what they're meant for. I guess I'm not quite seeing what you're saying about the tightening procedure. Now, this is only what works for me, but; take out the lash +1/4 turn, snug the allen lock, then tighten another 1/4 turn, and I've never had a problem with them.
You can use whatever works. I have the Comp adjustable type, and the locknuts have worked fine for 15 years.

If you do frequent adjustments, the polylocks are probably more dependable for staying in the adjusted position.