In row navani talked about tones and how some cultures thought there are 16 tones. What if there are in total 16 tones one for each of the shards and each one able to control investiture.
I.e., tone of endowment to take breaths without concent, etc.
The opposite of suppressor is using more stormlight.
Jasnah was able to use soulcasting with extreme power with a ton of stormlight using the perpendicularity.