I have been wondering what practical use this is in regular gameplay
If I play this for long enough without using their white skills, their bars turn lilac color.
My theory is that this indicates they can use their white skills 3 times in succession.
But I doubt this works in regular gameplay, since I’ve never seen them stack/accumulate energy this way between Campaign battles.
Like they don’t start a new battle with energy saved from the previous round.
So how useful is this really?