Board Thread:Questions and Answers/@comment-73.202.147.118-20150627001522/@comment-24.220.99.15-20150629225701

I was having trouble with it, too, but I tried it today, and poison alone WILL kill it before it uses Melt the World. It also does no damage before then, but the next bosses are tough, so I'd recommend not overloading on status inflictors (the very next one will remove buffs and paralyze you, so a status immunity leader is a must). I found that Netherking Hadaron's BB, which adds Poison to everyone's attack, worked well, so you might try something like that.