I'm going to take issue with this statement. Form comes first and always. Without decent form you can't properly tune a bow. To have decent form the draw length and draw weight have to be close.

Second might be properly spine arrows. If arrows are too weak in spine you'll never get a decent tune, especially with broadheads. Underspined arrows can be shot into decent groups. They will just fly ugly getting to the target.

Once good form is in place and proper arrows then you start tuning.