this BCNM is nearly impossible theres a reason that katana is 5mil(seraph) have 60 seconds to kill a bomb before it explodes.
i figure 6 smns ifrit astral flowing might do the trick but not gauranteed since this thing has a bum load of HP to take out in 60 seconds.
You could try 6 smns
6 mnk
5blms 1 sam
6 sams
not a big chance of winning but if you do pull it off thats alot of money in your pocket