Almond didn't kill the monsters and just sucked them with the syringe. If they were any weaker, they would've died with the spirit syringes, but fortunately, they didn't.
He wanted to remain 10 levels lower than the Heroic Challenge boss to get better rewards.
After returning to the Quartet Plaza, Almond sat down and looked at the third skill of his specialized class.
His first skill — Divine Divider's Harvest was not an offense-type skill. It was a utility type. He could divide attributes and use them on himself.
His second skill — Espada Ad Grimveil also wasn't an offense-type but a super support-type with his explored techniques within this domain.
1—Rift Displacement: Severe a space and displace it.
2—Spatial Severing: Sever the space while maintaining a connection between severed space or displace the connections.
3—Absolute Severing: Sunder everything you are able to perceive.