[quote=@Brithwyr]
<Snipped quote by Spriggs27>

Wait, what if he uses a "stockpile" Manifestation i.e. Juniper's ability to hold back pain and fatigue. Say he holds something in, then switches power. What happens to that excess energy?
[/quote]

Under my eyes, he would suffer the backlash, on the moment he switches from it, since he effectively decided to not concentrate on holding the damage anymore.