Best is a judgement and you are the judge.
You can best answer your question by thinking through how the garment or item will be used over the course of its useful life.
You can blend silk with wool when spinning yarn, without reaction.
wool from sheep. silk from silkworms.
Cotton, Linen, Silk and Wool Cotton, Linen, Silk and Wool By L Cotton, Linen, Silk and Wool By L Cotton, Linen, Silk and Wool By L
Solo yarn is a type of yarn with a worsted weight blend of silk as well as mohair with just a touch of wool.
Silk is smoother than wool.
Silk, rayon and wool are all fibres.
The four main natural fibers are cotton, wool, silk, and linen. These fibers are derived from plants (cotton, linen), animals (wool, silk), and insects (silk). They are valued for their comfort, breathability, and environmental sustainability.
A wool blend coat has been designed not to shrink, based on the blend of the wool. However, you could wash the wool coat in hot water with maximum agitation, which affects the wool, but not the blend. Your results would be unpredictable.
a wool blend means that other than wool, there are one or more other fibres/fabrics in with the wool.
Generally lightweight polyester and silk blends, washable.
Silk is well known for being warmer than wool. Nylon and cotton are poorer insulators. (As well, there are other types of "wool" which are known for being much warmer than sheep's wool...)
Silk comes from silk worms, and is not related to wool, which comes from animals that grow coats.