With regard to your tireless servant only made of stone, I have this for a character in another game:
Stone Servant
Humanoid Statue size of Adolescent of a young girl.
Pawns: 16/16
- Animate the Lab Servant: ReTe(Mu) 32: (Base 3, +2 mag sun, +2 mag precise
control, +1 mag affect stone, +1 mag requisite (mu), +4 constant, +3 only creator can command):
Servant can move and respond to orders from Megaira (and only her) for
duration. It can assist in lab following simple orders like Tireless
Servant (covenants p121) for +1 general Quality, +1 safety
Note: The pawns used is 16 for enchanted item with 5 powers. You would only need 4 for lesser item. (she has the lab cleaning spell from covenants, a defensive enchantment to keep her from getting stolen, and a few offensive powers)