PLD/NIN's enmity level is based on how fast they can hit the hate cap from casting Flash and curing themselves. A PLD with very little enmity can cap their hate, so he doesn't need much enmity gear at all. He should be using as much haste as possible, really, with enmity in the slots where there isn't any. +20-25 enmity and 18-22% Haste is optimal for PLD.
As for you, I'd try to get +15-20 enmity. With all of that, switching between AF2 hat and Turban (for shadows), Nashira, haste belt, etc., you can keep up fairly well. And yes, dual wield Mac+1's.
As for time to get hate - you'll need about 5 casts of spells before the DD can start. A PLD needs less time because they can Flash, Shield Bash, and open another JA and be set. Alternatively, if you're tanking something that has a set time limit (Ultima or Omega, for instance), you can open with Chainspell Binds to get yourself capped really fast.
It's really easy, but don't cry too much when you get two-shotted by any of the hard-hitting monsters (Tiamat, Khimaira, etc.).
