Dilya has told him that her ability is not combat oriented. Orun assumed it to be some sort of psychic ability, and wonders if such an ability would work against Mammon.
He has also seen the four elders in battle, and even though they did not go full mode on him, Orun estimated their full mode to not be greater than Cerberus.
There is also Theron and Monryck. He knows very well what those two are capable of. Orun can confidently say with his chest puffed out, that they are not at a stage to go up against Cerberus.
'I have to think of something to give them an advantage over'.
Orun rummaged through his memories for ways he can resort to, to prevent sending out Monryck and Theron on a suicide mission.
'Hmm.... I can create Efreet and salamander. If the two elemental spirits team up with Theron, Monryck, and the four elders, they should have a chance at taking down Cerberus".