I don't run any Associated cars so I can't provide any specific help to these directly, but what I like to do is study some posted setup sheets from pro drivers and try to compare what each driver is doing differently from the box stock setup. I also focus on looking for setups running the same class... where a mod setup will more than likely be very different from a stock setup.
One of my favorite resources for setups is Petitrc:
Team Associated B6 & B6D Setup Sheets
Team Associated SC5M Setup Sheets
If you're not familiar with what each setup option does, then I would encourage you to read the following setup guide to help give you a better understanding of what these options do and how to address any concerns with your cars:
https://www.teknorc.com/wp-content/u...t_Up_Guide.pdf
As for body rub, that is normal, there is a trade off between getting some rub and keeping your center of gravity as low as possible. You can certainly raise the body posts to eliminate rub, but then you risk increasing the CG and may start to traction roll. Here's an idea of where I'm getting scrub on my truck to give you an idea of what works for me:
