Freeze's Paralyzing Mix Augment stuns enemies for 0.4 seconds only on critical hits, which is not what the wiki page says about it (If an enemy is hit, the Stun status effect is activated for 0.4 seconds.). I suggest that all hits have to activate the stun effect, because 0.4 seconds only when a critical hit happens is incredibly inefficient considering you have -50% critical damage and freezing rate. Thanks and have a great day!