Vulcan’s Detonator got a pretty nice dot buff, which makes its free dot damage really nice. I’d avoid using it on a ranged damage focus setup, but hybrid and mod power setups are perfect for this thing.
You can get this item in Magir’s Dirge in Reisum
A lot of things count as explosives, sadly the World Breaker Mace does not, It totally should. Also I would like a long gun that can benefit from this as well.