Are some hyper skills replaced by hyper stats?

Well WHAT??! Potential doesn't apply to it??? I thought it's like base stats. Did you try?

It doesn't.

You can test it pretty easily. Compare your total int before and after you put a level into hyper int. You'll see it goes up by exactly 15 per level in the stat bar regardless of how much %int you have.

I find the %Min and Max Crit Damage hypers give more bang for buck than main stat hypers with high crit rate / high total main stat.