Some things need to be said about the Hakutaku fight.
It's one of those things that are especially easy, if you know what the hell you need and what you're doing.
First off, EVERYBODY should have oils and powders(tonko tools). Nothing spoils an Ohat run because people are retarded and keep getting aggro every 10 seconds. There are holes in the ground on the way to camp, DO NOT fall into them. It'll ruin your, and everybody else's day. You'll also need somebody with a Paintbrush of Souls.
The fight itself isn't too bad. You'll want a well balanced alliance of mages and melee. Tank can be either pld or nin, from what I've seen it doesn't matter much. Although it's prefered if they tank backwards. I don't recall the name of the S-Move hecteyes do, but it's one hell of a strong Paralyze.
Stunners are highly desired, the NM casts alot of big boomy spells, Flare, Firaga3 etc. Stun order ftw
Make sure you have an add's party, monsters will respawn during the fight and you'll want them eliminated as quickly as possible. I'd recommend having this party not in the main alliance. There are tonberries around, and it's second nature to CFH in order not to have Tonberry Hate, which WILL cause Hakutaku to be on CFH mode as well, even if you aren't fighting it. And THAT will especially ruin everybody's day.
And absolutely, positively make sure you're entire group is committed to this thing. Most people who show up want an Optical Hat of their own. I've done this run maybe 3 times now, and each time there were about 5 of 6 ppl who wanted a Hat, at least. Not at all unheard of to have maybe 10 ppl who have a cluster. These fights can last quite awhile, and the respawn of the ??? you trade to is like 10-15 mins.
Before you even head out, get everybody's guarantee that they'll stick around. What's worse than having people start leaving right after they get their hat because they suddenly remember they have something else to do, their LS doing sky or Limbus or some crap excuse. It's understandable if you're there for a few hours and people start needing to leave, parent/spouse aggro, it's just late, etc.
Don't pull favorites or "it's my run, my hat first". The best way I've seen, that removes the most drama from this is just random for it. Record everybody's lot. Highest goes first, and down the line. If some war/nin gets second chair to some whm, too bad. Not exactly right, or just, but fair. People show up halfway through, toss 'em in back of the line.
People will complain no matter what you do. Some mage will say he's done 10 runs and never got a chance for his hat because melee get priority, or some melee will ***** because he's last in line to some mage who "doesn't need it as much as I do". But again, my experience this is just the best way.
I can't promise anything, but I'll see if I can't help you out. Who wouldn't love a bard to come along anyway ^^b