As per the subject, it was a slaughter, just the two Talissa pets were bad enough, but the team had a Ronan to follow up and a Faye to keep them alive.
Are the devs competent? Surely they would have tested the new heroes in arena? At least trigger archer teams can fail to trigger and there's a counter team composition to them nowadays.
A further thought: I suppose a trigger archer team can still counter them, so long as they manage to kill off most of the summoners... once the summoners summon, I think the trigger archer team will drop fast too.