most of the fast guys are using no aids. But there were Top5 Drivers who used the allowed aids and throughout the grid its 50/50 I would say. So dont be afraid of using it for safety first and than when you feel confident with the car, turn it off and get prepared for Ace 2016
Hope to see you in PRO Division this year.
There is another option.
the aids will numb you to set up and driving errors, but might save you in a race.
If you are not quite happy to have none then you can for your benefit do ALL practice and set-up with them switched off. Then only in a race switch them (one or both) on as insurance.
Be aware that tcs can have an adverse effect on tyre wear. It will protect the rears and not the fronts, you can end up with uneven wear and resulting understeer.