If you do not have a scrolled horntail pendant, 4875 is the given "safe" hp to have when you are below level 160. When you have a scrolled horntail pendant and are at or above 160(horntail's level) it is deemed that 4850 is "safe". I really wouldn't suggest going lower.
EDIT: This goes for ALL classes as the body parts on the right side of horntail never do over 77XX when without the defense from a scrolled horntail pendant. Ignoring 1/1's, the highest I've ever seen is 7736 damage to my character, personally.
EDIT: This goes for ALL classes as the body parts on the right side of horntail never do over 77XX when without the defense from a scrolled horntail pendant. Ignoring 1/1's, the highest I've ever seen is 7736 damage to my character, personally.