I tested this with some friends and it works kinda nice!
Need: 1 lire, 1 arme, 1 lass, 1 ronan (all 1st job)
first of all ronan will launch boss in air with kanavan strike, lire will do the 3rd skill aerialing him big time, a bit later arme casts meteor(crazy damage when aerial meteor) and when boss lands lass does the last attack.
PS: All skills are 3rd skills
PPS: You must have EXCELENT coordonation
PPPS: Awkwaaaaard! it works 1/7 of times>.>
PPPPS: Just wanted to say I tested it 21 times>.>