1d3 minutes works for me.
Not that I recall. 1d6?
Looking back at the original monster, it seems there should be a numbing aura, too.
The original numbing aura is "Approaching within 10 feet of a spectral wizard causes portions of the victim’s body to tingle as if they had ”fallen asleep” and results in a -1 penalty to attack rolls." Sounds like a mechanical penalty to me.I could see boosting that to -2 and making it to all attack rolls, Str- and Dex-based skill and ability checks, and Ref saves, too.