I use CSA at weak, ASM on, and TC only on the GR.3 cars and some of the RWD GR.4 cars.
I also use the cone markers, the physical ones that show break points as some of the tracks really don't have good visuals for breakpoints.
Depending on the track, I really don't need these on some tracks at all.
I've been driving sims since this game came out and that's it.
I'm currently DR. A and SR. S, I'm happy if I set qualifying times within 2 seconds of the top qualifying time.
It was always my intention to turn the aids off over time, and I've been thinking about turning CSA off for awhile recently, I can't really recognize when it turns on as I tend to be very gentle with the steering controls as it is.
I have no idea what ASM does to my lap times.
I would love to have a wheel setup, but unfortunately for the foreseeable future that just isn't viable.
I'm going to run some hotlaps in qualifying tonight of whatever race I end up choosing - I'll run some with my normal setup, some with ASM off, some with CSA off and some with both off.
It won't be much (maybe 5 laps each), but I'll let you know what it does to my lap times and consistency.