"However, what is important right now is for me to finish that Quest before any new changes occur that could disrupt its progress once more." Darius stated, before summoning over Gunner and Xela using Miranda.
He let them know that they were going back down into the underground. The two seemed excited and relieved to continue what they had actually come here to do, as they had been thrust into many side quests after killing the Master stage bugs.
Right now, the last line of defense for the Insects were the Grandmaster Bugs and Beelzebub, so their job was a mixture of easy and tough at the same time.
Easy because their current power should be enough to fight with Grandmasters for sure, but tough because Grandmasters - and even the injured Beelzebub – was guaranteed to have means that could cause them trouble, especially since they were guaranteed to have made preparations for Darius' return.