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Both wire cutting and electric spark are rough machining (except for slow wire). Generally, the forming part of stamping die is less wire-cutting, mainly using forming grinding machine, optical curve grinding machine and coordinate grinding machine. Wire cutting is mainly used for padding. There are some special requirements for parts such as punch fixing plates that do not meet the requirements and are expected to be processed after heat treatment to avoid deformation. According to the molds that I have contacted in my work, in addition to having a vertebra, there is no special requirement.
The die of the metal mold will make a certain degree of vertebra in order to avoid jumping, so the equipment for wire cutting should have the ability to cut the vertebra.