Tanks, please use strength gear.. :(

[Hivernica]

I reached level 60 on my dark knight a few days ago and bought the vitality i170 accessories simply to help because the rest of my gear was lacking. Right now I'm i179 with around 16k. How much hp would I need? I have all the i190 strength accessories since I geared dragoon before I reached lvl60 on my DRK. In 8 man content most groups won't let me MT because apparently 16k is not enough.

Also, what is best? Attribute points in VIT, STR accs, or STR attribute points and STR accs?

[Ralvenom]

I reached level 60 on my dark knight a few days ago and bought the vitality i170 accessories simply to help because the rest of my gear was lacking. Right now I'm i179 with around 16k. How much hp would I need? I have all the i190 strength accessories since I geared dragoon before I reached lvl60 on my DRK. In 8 man content most groups won't let me MT because apparently 16k is not enough.

Also, what is best? Attribute points in VIT, STR accs, or STR attribute points and STR accs?

Attribute points in STR. Get STR acc when the rest of your gear is good.

[Voldemort]

I believe if you are a PLD, then you stack vitality.

The reason being is to allow the PLD to do their own "healing" with stoneskin and protection. They can absorb as much damage as possible before a healer has to intervene.
In which case a healer can in all other times, perform nuking DPS actions.

If you are a WAR or a DRK, then the best option is to give yourself just enough vitality to survive, and stack strength for the rest. This maximizes the DPS potential of each, because the healer has to heal Wars and Drks more often than Plds.