An impossible battle. That was certain.
In terms of higher Stage opponents, the only one they properly won against was Perina. However that was with outside help, essentially half the Eastern server working together, and every ounce of power they could manifest.
Now they had to fight an even stronger existence than Perina, and were far from their peak state. Additionally the fatal weakness of the Chimeras was no longer applicable. Leaving them with a Third Stage being that was capable of insane amount of regeneration.
As expected there was not a single thing they could do. It was undeniable.
They could not defeat this Chimera.