NIN: 57 to 60. Only reason you could possibly do this is to dualwield axes for rampage.
No, /NIN to save yourself and not be an MP drain.
In my opinion, good gear gets you so far, but knowing what to do matters the most. Instead of listing all the gear and telling what subjobs to make, how about giving some real advice.
The first step in being a good DRK is knowing how to stun. Stun is the reason why DRKs are more useful in my opinion than other DD jobs. Learn to be quick with stun and you are better than most DRKs.
Another way to be a good DRK is to utilize your Absorb spells, and not just Absorb-TP. When you fight a mob that seems impossible to hit, toss in an Absorb-AGI. Taking 20-25 AGI away from the mob makes it easier to hit.
Have all sub jobs leveled, not just thief, warrior, and samurai. I have NIN, RDM, WHM, BLM, DRG, WAR, SAM, THF, BST, and RNG all leveled to sub if the occasion calls for it. Why be mediocre and have just DRK/THF or DRK/WAR when you can have fun with DRK/WHM or DRK/RDM. DRK/SAM is a good choice, but for maximum damage with survival, I stick with DRK/THF. Seigan and Hasso add too much delay to my spells and DRK doesn't need a longer timer on Stun.
And make sure to cap your magic skills. So many times I've gotten complements on how high my drain is or how I helped sleep a link in an XP party. Every little bit helps for being a better DRK. Gear is one thing, but doing the little things that gil can't buy is what makes you a better than average DRK.
EDIT: And for the love of god, keep scythe, greatsword, axe, sword, and great axe capped. You'll need to have certain weapons for certain type of mobs.
EDIT: I use parade gorget all the time. As long as you stay above 85% HP you get 1 tick per second. I never run out of MP while other DRKs do. Edited, Nov 3rd 2006 at 8:09pm PST by Youngjin Edited, Nov 3rd 2006 at 8:14pm PST by Youngjin