Probably 140 since that's when we stop getting 4th job SP.
I think the timing's a bit odd since they just started replacing obsolete Hypers (Drk's HB hypers, etc.) and 5th job will likely require them to change a lot of them over to 5th job skills, so it's a bit weird that they're finally streamlining Hypers right before needing to change everything around. Then again, Nexon's never been great with timing (i.e. Hypers with above-average damage caps right before raising the damage cap).