Back when i had a lld glass canon charger last lad, i ofc used an insight, +crit and psn dmg on same weapon, and i could tell a signifcant difference in dmgs, i assumed the differences were from when cs was activated and when it wasn't.
So my assumption is that it doesn't affect it.
Idk, make a high dmg char with 100 ds or cs and like 1 psn charm to test it maybe?