My thoughts on Mummy Dust.
I notice that almost all enemy mummies have a fear aura.
Shouldn't mummy dust have this as well?
DC? 10+splvl (10) +casterability mod, so dedication would = 40DC max
Leave the Mummy dust spell having mediocre attack/dmg: 3attacks/round, 2AB/3casterlevels, uses an Imbued Halbeard that gets Enhancement bonus of 1 + 1/10casterlevels, gets Imp. Crit. Halbeard @ casterlvl 30.
So @ casterlvl 40, AB would = 26(caster lvls) + 5 (wpn) + 14 (total str (38 )) = 45 total AB
Damage: 1d10 + 21 (18-20 X3 crits)
+2d6 slash dmg
+2d6 massive crits
Base Abilities:
STR 26
DEX 10
CON 10
INT 8
WIS 10
CHA 4
Saving Throws = 10 + 1 / 2casterlevels
AC = 1/casterlvl and wears normal Chainmail (47AC unbuffed at lvl 40 assuming atleast +4 bonus DEX)
HP = 10/level + CON bonus (assuming the mummy has same number of levels as caster, 400 base + 240 maxCONmod = 640HP @ casterlvl 40.
All immunites that undead enjoy.
Regeneration: 2 / 10casterlvl
SR = 1 / casterlvl (equal level mages should have no problem hitting each others' mummies with spells)
Skills:
Discipline = 1 / casterlvl
Concentration = 1 / casterlvl

