I’m not one of the developers, so you might want to double check this. I wouldn’t unring the data if using the minimal processing data, this step should be done before the distortion and eddy current corrections.
Regarding the bias field correction (using dwibiascorrect), this step is completelly optional. The bias field correction will be perform later using mtnormalise.
You could just use the minimally preprocessed data to calculate the response function (with the new dhollander algorithm), then calculate the FODs (note that if you want to do group studies, you need to use the average response function), after that mtnormalise and finally tckgen. Note that if you want to run ACT, you have new algorithms to generate the 5TT, gif and hsvs). Finally, you could use SIFT2. I hope this helps.