It is indeed the optimal setting for me.....more articulation equates to offroad performance.
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Optimal based on what? How much front shock travel does yours have? At what setting does the AR start to restrict your shock travel during articulation?
Here is the same moment on mine. ~11" travel front shocks with the AR on the middle setting. The shocks are positioned to use nearly all of their travel. The low tire was hanging from the extended shock. The stuffed side was fractions of an inch from fully compressing the jounce into the cup.
I strongly believe mine could go even stiffer and still do what it does without restriction. And the Jeep would be even more stable in it's movements.