The Phonak hearing aids could be set to Adapive Phonak Digital Contrast 2.0 (ADPC 2.0) fitting formula which provide slower adaptive compression.
For your clients with poor auditory resolution abilities, you can select Adaptive Phonak Digital 2.0 Contrast in Naída Paradise/Naida Lumity. It slows the compression to preserve the contrast between loud and soft sounds. Because of the new adaptive compression speed in Paradise, APD 2.0 Contrast it results in even more contrast, than the original APD Contrast.