From what I read on officials, PK's doesn't have anything to do with mummy per say

But If you're doing well an imm could bump up your chances. The only hard-coded factors seem to be age and undead skills, ie animate dead, greater undead, lesser golem. I was basically just curious as to how likely it was for the others to get mummy.

Or maybe even go Wight, use empire for protection, then go wight and get the anathema.