VIT and DEF question

[hulken]

I wanna know the difference between VIT and DEF.
i.e How much DEF is VIT+1?

Ive heard that VIT+2 equals 1DEF. But i have allso seen'
people saying that that DEF becomes lesser important at
later levels that you should rather buy VIT+ stuff then DEF stuff.

But if the first statement is right that sounds wrong, couse
DEF is twise as good?

I would like to know if VIT only gives the same effect as DEF
or if it does something else aswell?
i.e MND gives both better cure´s and magic defence.

This might be a noob question but you can´t be best at
everything

[Glucian]

From the sticky at the top: (Good info, read it)

VIT : VIT is much more important than some people will have you believe. The damage formula can be found on this site: http://www.moonlight.gr.jp/~el/ffxi/ab_calc.html.en
Basically, there are two checks depending on Stats: STR<->VIT check and ATK<->DEF check. Obviously, the STR and ATK are the attacker's stats, the DEF and VIT are the victim's stats. Anyway, STR-VIT has a linear relationship, meaning that the amount of damage decreased for every VIT will be the same regardless of how much VIT you have. ATK-DEF is exponential (curved), meaning that after you reach a certain thresholed (when DEF=ATK generally), you will start to see "diminishing returns". This means when you have low defense, a +50 defense boost will decrease the damage you take noticeably. But when you have high defense, a +50 defense boost will not change the damage you receive much, if at all. High defense is very easy to achieve thanks to several abilities and food that increase DEF by a percentage: Sentinel, Defender, Rampart, Boiled Crab/Fish Mithkabob, etc... so after a while, VIT becomes more important than DEF. At lower levels, however, DEF is generally more important. Also keep in mind 2 VIT = 1 DEF, which helps a small amount.