@treynterrio As @orange says the best method is to gain stage within the fx chain. Test it out and use simple gain nodes when you think it is appropriate. Say you have a waveshaper and the "drive" parameter is adding 12dB of gain, then use a simplegain and offset it by the same amount.
Adding a limiter can help but you should only do this if it is absolutely necessary. There is a really great faust limiter I like to use a lot https://faustlibraries.grame.fr/libs/compressors/#colimiter_1176_r4_stereo
And there is more in the faust library you can try if it doesn't work for you. You could probably get similar results in RNBO but faust is faster to implement and well-researched.