In case anyone was wondering, the mem blur component of this spell is MUCH higher than 1%. There was likely a stealth buff done at some point, because I havent had the level 2 Mez NOT mem blur a target practically every cast.
This has made charm soloing extremely efficient and easy, as any time charm breaks, toss out a Mez and it will instantly wipe all hate. Merc can then very easily pick it up, or you can just re-charm the mob.
It hasnt worked every time, but as far as my limited research is concerned, about 1 out of every 50 casts has not mem blurred the target. Hence, the mem blur component is a much higher percent chance than 1%.