Mishaclerics are overpower 

 They can stand happy under full crazy army of necro. All she needs now is some fighter or invoker damager! (And Unreal not to slay damager in 3 seconds 

 )
3 seconds? I think he will be ofended a bit. It usually takes 2 rounds 

 (1 for warrior 

... though karadog did really fine damage with flurry (4 massacres hehe)
no, mishakleriks are not the only one to stand against mummies...there are other choices too,
the best thing (i wonder why nobody made one already) is alter in armadillo form and way of gargoyle feat
or druid mino with sanc (from orb or other)
but that is not the problem, the problem is what ever you prepare for mummies, pwk can do the job.
I can make my elf druid immune to mummies and damage well with geysir, but sleep is the problem. Without medallion from Alfred, it is not recommended to attack her. 
but even medallion is not 100% safe because of pwk. So finally to fight you must meet next conditions :
1. Divinely resistant from bashing
2. Immune to sleep
3. Immune to pwk
and who does not meet those conditions, shouldnt even think of it... 
ps ah,yes sorry for discusing about this in public instead of using irc