STR for attributes definitely. Gear u wanna play by ear.

Here's the thing, VIT really only matters for surviving large hits like tank-busters during boss fights. Outside of that, how much HP you have doesn't matter nearly as much as how much HP you can recover/how much you can mitigate over an extended period of time. If your healer is terrible, the trivial amount of HP from ur VIT attr points isn't going to help you.

STR on the other hand, will help with HP recover when you consider the HP absorption of DRK. It will also increase your dmg to help you keep threat, killing mobs quicker means incoming DPS goes down faster, and increased parry chance also decreases the incoming DPS.