Set her on fire

Cut her head off with a dull axe

Throw live wires at her when she's wet

Dip her in honey or molasses and throw her into a pit of fire ants

Hang her by the hair and let her starve to death

Immobilize her on the shore of a wave pool filled with Hydrochloric acid

Acupuncture gone wrong (use your imagination)

Crucifixion

Pull out her fingernails and toenails one by one and let her bleed to death

Remove her skin and let her bleed to death