Was pretty easy with Bst/whmx1 Blu/whmx1 and Pld/warx1
Won three times with little difficulty
+CHR gear/food for the Bst is a MUST. All three times, we went in, Bst ate a Tuna sushi or Tavnazian Taco( Bst had +22chr after eating the taco). Blu casted protectra, Bst casted aquaveil on himself, pld casted shell on us all, rested to full MP, Blu casts cocoon. Bst charms furies on the right and 2hrs, took him a few tries with only +20 chr but got the charm first try with +21-22. So assuming you get the charm first try, sick the furies on the Colo-colo, and have the Pld pull the remaining furies away from the Colo-colo to prevent aggro, Then pld just starts meleeing, and blu just starts bludgeoning the **** out of the furies, which takes them down VERY quick, because Bludgeon does massive damage. After the furies are done with, make sure Colo-colo is winning, if it looks like he might lose have your furies heel, and let them die, but the Colo-colo will most likely win, leaving you to kill it easily within 10 seconds.
Food/medicine/drinks:
Bst-Tavnazian Taco or Tuna Sushi(preferrably the sushi for more +chr)and
2-4 Hi-pots in case of mischarms.
Blu-2 Hi-pots, which will most likely not be needed unless bst fails on first charm, but nice to have just incase.
Melon juicex2 for constant bludgeon and incase you have to cure Bst while he attempts to recharm.
Pld-1 Hi-pot Just incase.
Astral Ring 1/3
Thunder spirit pact 2/3