It served Skullius to eliminate all the enemies swiftly and leave the Quadrosphere before whoever he surmised the armored figures were waiting for showed up. Using Focused Null Life Ota to do that would have been the perfect strategy, but it turned out to be too expensive. The cost grew exponentially as the rank and power of his enemies increased.
The [Circuit of Impunity] was a viable option at his disposal as well. With all of its available applications, Skullius could have wiped out the troops standing against him easily.
…But he didn't summon In and Mu. Indeed, haste was required as he had just provoked the Aspire to Divine, but he had conjured a few ideas for pacifying them if needed. Each one was very tantalizing.
Also, as it happened, dispatching the enemies around him wouldn't serve no purpose. There was also value in properly evaluating the strength of the supposed rival force of the Primeval Deities.
