For anyone planning on getting mnk af3+2 hands, I highly recommend you start now, even if you don't have +1 hands yet.
Basically, get a pop item (can camp it w/ frends, or farm gold chests. I did gold chests. For Amber, take the hybrid elementals down to about 15%, swap to staff, get down to 1-2% and use Cataclysm. Earth crusher works if staff is too low for Cata, but it fails to do 1% most of the time so if you don't kill it, you have to grab a pugil and get tp and try again).
Once you get your pop item, go to port jeuno and shout Abyssea Grauberg boss clear, do you need it? Wieldance jewel, mine. About 2 seconds later you'll get about 20 or so /tells from ppl wanting clear.
I usually go mnk + nin or pld + whm + whm (1 for each tank) + brd + blm + blu (You want to proc grellow).
Make sure your whm has refresh atma. Once you have your keyjobs, then just fill the ally w/ ppl who want clear (aka be nice to ppl even if you don't need them). If someone has thf let them come on that for TH. Anyone else just have them come a mage or /mage for back up cures or to sit there and do nothing.
Fight is pretty straight forward. has 2 modes, melee mode (triggered by painful whip) and mage mode (triggered by pansomething).
Will always pop in magic mode. Let the pld or nin establish some hate because you can't damage it (you heal it) w/ physical dmg in magic mode. Then your blm and you (ninjutsu) will spam t1 spells and ninjutsu nukes to feed it tp to force swap to melee mode. Then when in melee mdoe, go to town on it, use subtle blow gear and penance to keep in melee mode for a good period of time before swapping back. After this first round, when it goes back to magic mode, enough hate is established to start working on grellow.
Proc that, and just continue the cycle till fight is done.
Grats on hands.
Do it while many ppl actively seeking clears. From 0/6 to 6/6 jewels for +2 hands, took me about 4hrs this morning.