Help a fire-starved alt with 1360?

As you can see, metal bosses are pretty much this account's Kryptonite. I was stuck on Syclinder for ages and didn't have half this gear back then. My heavy hitter is Malice (lol, not on this floor it's not) and my only options for fire damage at all are turbo Anger and support from Joy. (I guess technically Pain if I wanted to be an absolute lunatic about it)

I'm sure there has to be some good way to knock down Kartharok's shield with the pets and gear I have to work with, but I haven't found it yet.