Just for information:
I saw an interview with John Clayton a while back & he mentioned he uses Thomastik Superflexibles.I have used these in the past & they are a good all_purpose string-not as twangy as Spirocores.They only come in orch. & solo gauges,though.
I was at a masterclass with John Clayton about a year ago and he was using and recommending Evah Pirazzi's. Said they were good with the bow as well as pizz.