Apart from the continuous Trooper farming, the other thing you ... or more one-eyed monsters throughout the map. These are called Creepers in Deadlock, and you can get souls by killing them.

Deadlock is a MOBA at heart, which entails quite a few things. Firstly, farming souls and defeating minions and mini-bosses around the map is crucial. Secondly, it can be your preferred playstyle ...