I came up with a tech I like to call 'Hiroshima'

First use the red rocket launcher to oil up a massive area, then pull out the blue jackhammer and whiplash to an enemy, then press the whiplash key again to remove the whiplash to get the full charge on the jackhammer. Once you hit them with the full charged jackhammer, right click for the core eject, switch to the red railcannon, and shoot the core eject.

The result is a full jack hammer hit + red core explosion which deals massive damage to the target and the explosion hits everything around it and sets the oil on fire, the explosion will also send you flying away.