Electricity and water (in this case, saliva) work so well together. And stunning was just about enough for Demona.

As she heard Londo, the gargoyle smirked wide "I need no blade!" she had her claws; the female jumped on the enemy and she did claw it; its face, its eyes, like a furious animal, and aiding all of that violence, she also used her Weapon, hitting the top of the mole's head to make it go unconscious.

It was hard at first, since the mutated animal was disorientated and was clawing at anything randomly, but it also helped because it ended up hitting itself time to time in the process. And Demona's and Londo's blows eventually worked.