HellFire for sure, but also something corrosive. Depending on what you got to get you there, the Teapot from the Tiny Tina quest chain works wonders against Armor :) --- Spell card! Diamond Will ~ Unbreakable Determination!
I've been using a slagga with a fire and corrosive practicable slow hand, and a rocket launcher to stand up. --- Gamer for life, 31 years and counting. A life without video games is not a life worth living.
I've been getting good results with a slag conference call and an Unkempt Harold, dual wielded. None of the corrosives I've used have worked well on loaders, but I haven't tried my level 50 Hornet yet.
Something that does massive critical damage will help on constructors. They're immune to slag, if I'm not mistaken. --- XBOX Live Gamertag: danishjuggler03 "I refuse to quote myself in my signature - I've always thought people who do that are lame." - danishjuggler21