I don't get why Astral Healing Potion is so expensive to make, rank 3 is gated behind a reputation grind that takes ~2 months to get and on top of that warlock healthstones restore more HP and they are free if you have a warlock.
Astral Healing Potion should provide a flat % HP heal, like 30% while warlock one is 25%. (effect reduced above 110lvl)