I've tried it several times as a BLM. The first boss is pretty much impossible for me. The frequency at which the spears show up is so fast that I can't keep up. After I get him to about 90%, he starts throwing them down. By the time I kill the 3rd spear, hes tossing them down with no break every 6-7 seconds. I try killing them and sending my party after them, but they come so fast that I can only kill maybe 4 or 5 more before there's too many and the debuff winds up killing me. I can only get him to like 70% health.