You really, really need different skills depending on the model.

If you are using Qwen 27B you need very prescriptive skills.

If you are using Astra you usually want very minimal skills (because it will follow them but be unnecessarily constrained in some contexts)

If you are using Fable then it depends - it will take the skills as general guidelines but ignore them a lot more than Astra does. Sometimes this is good, sometimes not at all.