I came across a caster's realm comment that made me question the level mez's memblur became less reliable. I had originally stated it was somewhere from 30 to 35 , but could only find statements mentioning level 35 being the cutoff for reliable memory blur. However, I noticed a webarchived comment from July 6,2000 on caster'srealm for entrance:
I hadn't tested int he 30~35 range, so on EQLive I grabbed a
CWG Model XA which is reported to have a level range of 32-34,
CWG Model MA levels 30-32, and
a young goblin 18-20.
I cast mesmerize twenty times each. Mesmerize
failed to blur the XA 10 times out of 20, the MA 3 times out of 20, and the goblin 1 out of 20 (19 successful memory blurs).
I also tested refreshing mesmerize, and using the mechanical gnome's con to see if they were blurred, which has so far always indicated a successful blur on non-kos mobs. Only the first mesmerize in a series of twenty successfully blurred the mob.
It turns out my previous tests don't appear to have been large enough, and the 95% blur rate indicated on caster's realm may indeed be more accurate and I had just been lucky in my application of mesmerize for its memblur effect previously.
For a follow-up, I tried
a kobold guardian, level 42. 6 failed blurs out of 20.
For live to p1999 comparison: 20 casts on a fire beetle in qeynos on live by a 23 enchanter, all 20 applications successfully blurred the beetle. 20 casts of mesmerize on a fire beetle in qeynos on p1999 by a 12 enchanter, 0 out of 20 successful blurs.
I apologize for not considering the memblur to be on more of a sliding scale depending on the mob's level, rather than an on/off switch that lead me to misinterpret results on very low level mobs. That also shows my correlation to the effects of feign death by level are not as apt as I had thought.