That is very broad spectrum for one board to cover. I have ridden a Custom a few times, and personally, I would not take it anywhere near the park, esp rails. FAR too stiff, IMHO, for that type of terrain.
Mainly I spend my time ripping down tree trails, groomers, and often hit jumps. I will hit a rail or box if it is in the way... but I am not a park whore... More of an All-mountain rider... hope that clears it up a bit.