Currently I have almost full Ampdor Keep gear (Item lvl60) with a few pieces of darklight thrown in but it seems the hp pool needed for hard mode titan is far too high. With my current gear I have 3162 hp but 3500 appears the be the minimum, especially when it comes to being invited to a group.

How can white mages get a high enough level of hp without stacking vitality materia (which are incredibly costly on my server). It seems the only option is to have a superior gear level compared to everyone else to compensate?