Venerable Rixt O'Callahan, the Flagrant Vandals' nominal expert pilot, last exhibited a resonance strength of 30 laveres. In his prime, his resonance strength peaked at 44 laveres.
The resonance strength of expert pilots ranged from 1 to 67 laveres.
Though the scale wasn't quite linear, you could roughly say that three Venerable Karol Xie's wouldn't be able to defeat a single Venerable O'Callahan, even if the latter was on his deathbed.
Resonance strength directly amplified several piloting parameters of a mech pilot and their mech. It strengthened their reaction speed and thinking speed. It increased their ability to resonate with the exotics incorporated in their custom mechs, thereby achieving stronger reality-bending feats. It strengthened the resonance shield that most mechs were able to emit from their frame. It added substance to their skills, so that they were far more than fancy-sounding names.