Playing Chronomancer and using both the Daze mantra and the Condi Cleanse mantra, when I have full charges (2) on my mantra readied and I enter Shift (F5), I will use both of my mantra charges in shift. With my other skills, when I come out of shift I am back as I was before going in. However, with the mantras, whatever I used in shift carries over to the non-shift state afterwards. Meaning, I enter shift with two charges, use those two charges in shift, and when I come out of shift I have 0 charges and the mantra is still recharging at the normal CD timer that it was while I was in shift.